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Suggested Projects/Archive

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This is a log of the projects completed in past years.

2012

  1. (Done) Recycle A187733, A187734 etc. up to approximately A187812. R. J. Mathar 20:02, 22 December 2012 (UTC)
  2. (DONE) Replace richardchoulet(AT)yahoo.fr by _Richard Choulet_ — R. J. Mathar 15:59, 19 December 2012 (UTC)
    I instead changed Richard Choulet (richardchoulet(AT)yahoo.fr) and R. Choulet (richardchoulet(AT)yahoo.fr) to _Richard Choulet_. Charles R Greathouse IV 20:53, 19 December 2012 (UTC)
  3. (DONE) Replace Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de) and W. Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de) by _Wolfdieter Lang_ . R. J. Mathar 11:54, 30 September 2012 (UTC). Replace Roger L. Bagula and Gary W. Adamson (rlbagulatftn(AT)yahoo.com) by _Roger L. Bagula_ and _Gary W. Adamson_ . The same for the case without middle initials. R. J. Mathar 07:44, 9 October 2012 (UTC)
  4. (DONE) Replace Steven.Finch(AT)inria.fr (S. R. Finch) and S. R. Finch (Steven.Finch(AT)inria.fr) by _Steven Finch_ R. J. Mathar 08:03, 10 October 2012 (UTC)
  5. (DONE) Replace Alonso Delarte (alonso.delarte(AT)gmail.com) by _Alonso del Arte_, R. J. Mathar 19:27, 10 October 2012 (UTC)
  6. (DONE) Replace Paul Barry (pbarry(AT)wit.ie by _Paul Barry_
  7. (DONE) Replace Patrick de Geest (pdg(AT)worldofnumbers.com) by _Patrick De Geest_
  8. (DONE) Replace Paolo P. Lava & Giorgio Balzarotti (paoloplava(AT)gmail.com) by _Paolo P. Lava_ and Giorgio Balzarotti
    I used the replacement text _Paolo P. Lava_ and _Giorgio Balzarotti_ instead. - Charles R Greathouse IV 14:53, 24 August 2012 (UTC)
  9. (DONE) Replace M. F. Hasler (www.univ-ag.fr/~mhasler) and Robert G. Wilson (rgwv(AT)rgwv.com) and the same with lowercase (at) and RGWv and rgwv by their _M. F. Hasler_ and _Robert G. Wilson v_ equivalents. R. J. Mathar 10:23, 7 July 2012 (UTC)
    Not all that easy; Wilson's name appears in many forms. I corrected some manually and the others with global edits. Both should be done now. Charles R Greathouse IV 19:32, 14 July 2012 (UTC)
  10. (DONE) Replace links to Steven Finch's algo.inria.fr/bsolve/ , which moved, by www.people.harvard.edu/~sfinch/ R. J. Mathar 21:18, 29 June 2012 (UTC)
  11. (Done) Replace njas(AT)research.att.com by njasloane(AT)gmail.com — R. J. Mathar 13:11, 25 February 2012 (UTC)
  12. (DONE) Replace dml(AT)hpfrcu03.france.hp.com by patrick.demichel(AT)hp.com R. J. Mathar 15:17, 24 February 2012 (UTC)
  13. (DONE) Fix ~30 tabf sequences not marked tabf.
  14. (DONE) Please replace http://www.mscs.dal.ca/~joerg/res/fq.html with http://www1.uni-hamburg.de/RRZ/W.Keller/FermatQuotient.html everywhere in the OEIS. Thanks! Max Alekseyev 04:32, 30 January 2012 (UTC)

2011

  1. (DONE) Replace pierrecami(AT)tele2.fr by pierre-cami(AT)bbox.fr — R. J. Mathar 14:16, 30 November 2011 (UTC)
  2. (DONE) Please replace http://www.cs.ucsd.edu/users/maxal/gpscripts/ with http://cse.sc.edu/~maxal/gpscripts/ everywhere in the OEIS. Thanks! — Max Alekseyev 10:47, 1 December 2011 (UTC)
  3. (DONE) Replace the ca 970 broken links to algo.inria.fr/bin/encyclopedia by equivalent ref to algo.inria.fr/ecs — R. J. Mathar 18:07, 27 November 2011 (UTC)
  4. (Basically done by previous work by Brockhaus and Lava) Add the surds to all periodic sequences for which the sequences are the continued fractions (if all terms in the period are > 0). — R. J. Mathar 13:33, 21 November 2011 (UTC)
  5. (DONE) How should we celebrate reaching 200000 sequences, which will happen soon? (Back in 2004 when we reached 100000 sequences we held an eParty - see https://oeis.org/100k.html.) — N. J. A. Sloane, Oct 26 2011
    I wonder if we should hold off and celebrate a quarter-million instead. In any case I think you should reserve A200000 and make it something special (like A100000). — Charles R Greathouse IV 15:11, 10 November 2011 (UTC)
    I reserved A200000 and am looking for suggestions for an appropriate sequence — N. J. A. Sloane, Nov 14 2011
    I just created a link to that page, suggestions for an appropriate sequence — M. F. Hasler 20:28, 14 November 2011 (UTC) (DONE)
  6. (DONE) Coming up with better names for all sequences titled "See [computer program] for definition." There are about half a dozen such sequences for Mathematica, there may be some for programs not meant for number theory (such as VBScript for Microsoft Excel) or obscure programming languages like UBasic.
  7. (DONE) Adding sequences listing arithmetic progressions of squares. The following papers are relevant: http://www.math.uconn.edu/~kconrad/blurbs/ugradnumthy/3squarearithprog.pdf and http://www.math.uconn.edu/~kconrad/blurbs/ugradnumthy/4squarearithprog.pdf Work has begun on A198384 — A198390
    I'm hinting that the idea could be generalized to quadratic progressions of cubes, cubic progressions of fourth powers, ... — Daniel Forgues 01:15, 27 October 2011 (UTC)
  8. (DONE) Sequences pertaining to rows, columns and diagonals of Ulam's spiral (2010)
  9. (DONE) The paper V. Alvarez, J. A. Armario, M. D. Frau and F. Gudlel, The maximal determinant of cocyclic (-1, 1)-matrices over D_{2t}, Linear Algebra and its Applications, 2011, in press; doi:10.1016/j.laa.2011.05.018 references the OEIS, but I don't have access to it. If it contains a new sequence then that should be added to the OEIS. If it cites an existing sequence then we should add a reference from that sequence to this paper. Can someone look into this? — N. J. A. Sloane, Oct 28 2011. The URL is http://www.sciencedirect.com/science/article/pii/S002437951100423X
    Table 1:
    Proportion of inequivalent Hadamard matrices (cocyclic/general framework).
    n 4 8 12 16 20 24 28 32 36
    #[CH] 1 1 1 5 3 16 6 100 35
    # [H] 1 1 1 5 3 60 487
    If we attend to the summation of the number of Hadamard matrices equivalent to a matrix of [H] and [CH] in Table 1, denoted by #H and #CH respectively (the required information may be extracted from [27] and [32]), we obtain Table 2."
    Table 2:
    Proportion of Hadamard matrices belonging to equivalence classes [CH] and [H].
    n 4 8 12 16 20 24 28
    #CH 192 21,504 190,080 10,838,016 16,440 790,224 64,488
    #H 192 21,504 190,080 10,838,016 16,440 823,616 74,306
    [27] P. Ó Catháin, M. Röder, The Cocyclic Hadamard matrices of order less than 40, Des. Codes Cryptogr. 58 (1) (2011) 73–88.
    [32] N.J.A. Sloane, A Library of Hadamard Matrices (website), http://www2.research.att.com/~njas/hadamard/.
    [33] N.J.A. Sloane, The On-line Encyclopedia of Integer Sequences (website), http://oeis.org/."
    — Jason Kimberley 09:43, 31 October 2011 (UTC). DONE!
  10. (DONE) Same thing for this paper: Heng Huat Chan,Yoshio Tanigawa, Yifan Yang and Wadim Zudilin, New analogues of Clausen's identities arising from the theory of modular forms, Advances in Mathematics, Volume 228, Issue 2, 1 October 2011, Pages 1294-1314; doi:10.1016/j.aim.2011.06.011; http://www.sciencedirect.com/science/article/pii/S0001870811002003.
    In this case, the sequence matches nicely with a sequence in [20].
    [20] N.J.A. Sloane, The on-line encyclopedia of integer sequences, published electronically at http://oeis.org, 2010.
  11. (DONE) Same thing for this paper: G. Le Caer, A New Family of Solvable Pearson-Dirichlet Random Walks, Journal of Statistical Physics, Volume 144, Number 1, 23-45, DOI: 10.1007/s10955-011-0245-4; http://www.springerlink.com/content/4225546845h58j2h/.
    Added reference to A100861. — Charles R Greathouse IV 13:52, 31 October 2011 (UTC) (DONE)
  12. (DONE) Same thing for this paper: C. Phatak, R. Pokharel, M. Beleggia and M. De Graef, On the magnetostatics of chains of magnetic nanoparticles, Journal of Magnetism and Magnetic Materials, Volume 323, Issue 22, November 2011, Pages 2912-2922; http://www.sciencedirect.com/science/article/pii/S0304885311004124. I don't have access to it. If it contains a new sequence then that should be added to the OEIS. If it cites an existing sequence then we should add a reference from that sequence to this paper. Can someone look into this? — N. J. A. Sloane, Oct 28 2011.
    This magnetostatics paper does not cite any specific sequence: "By expanding these hypergeometric functions and extensively using Sloane's Encyclopedia of Integer Sequences [21], we arrive at ...". It does not seem to contain any new sequences. — Jason Kimberley 09:43, 31 October 2011 (UTC). DONE.
  13. (DONE) # The following paper apparently references the OEIS, but I do not have access to it. If it contains a new sequence then that should be added to the OEIS. If it cites an existing sequence then we should add a reference from that sequence to this paper. Can someone look into this? — N. J. A. Sloane, Nov 01 2011: Lisa Glaser, Causal set actions in various dimensions, Journal of Physics: Conference Series, 2011; J. Phys.: Conf. Ser. 306 012041 doi:10.1088/1742-6596/306/1/012041; http://iopscience.iop.org/1742-6596/306/1/012041. Nov 03: I now have a copy of this paper. (DONE)
  14. (DONE) # The following paper apparently references the OEIS, but I do not have access to it. If it contains a new sequence then that should be added to the OEIS. If it cites an existing sequence then we should add a reference from that sequence to this paper. Can someone look into this? — N. J. A. Sloane, Nov 02 2011: Kentaro Ihara, Derivations and automorphisms on non-commutative power series, Journal of Pure and Applied Algebra, Volume 216, Issue 1, January 2012, Pages 192-201; doi:10.1016/j.jpaa.2011.06.004; http://www.sciencedirect.com/science/article/pii/S0022404911001484. Nov 03: I now have a copy of this paper. (DONE)
  15. (DONE) # The following paper apparently references the OEIS, but I do not have access to it. If it contains a new sequence then that should be added to the OEIS. If it cites an existing sequence then we should add a reference from that sequence to this paper. Can someone look into this? — N. J. A. Sloane, Nov 01 2011: Anders Claesson and Svante Linusson, "n! matchings, n! posets", Proc. Amer. Math. Soc. 139 (2011), 435-449; http://www.ams.org/journals/proc/2011-139-02/S0002-9939-2010-10678-0/home.html. Nov 03: I now have a copy of this paper. (DONE)
  16. (DONE) The following paper apparently references the OEIS, but I do not have access to it. If it contains a new sequence then that should be added to the OEIS. If it cites an existing sequence then we should add a reference from that sequence to this paper. Can someone look into this? — N. J. A. Sloane, Nov 02 2011: R. R. Birss, The Saturation Magnetostriction of Ferromagneties, Advances in Physics, Vol. 8, issue 31, [1959], pp. 252-291; DOI:10.1080/00018735900101198; http://www.tandfonline.com/doi/abs/10.1080/00018735900101198.
    There seem to be no OEIS-worthy sequences in this. There are very short rational expansions of some tensorial expressions related to the space-group symmetries in crystals. — R. J. Mathar 16:12, 6 November 2011 (UTC) (DONE)
  17. (DONE) The following paper apparently references the OEIS, but I do not have access to it. If it contains a new sequence then that should be added to the OEIS. If it cites an existing sequence then we should add a reference from that sequence to this paper. Can someone look into this? — N. J. A. Sloane, Oct 28 2011. The paper is: XiKun Li, JunLi Li, Bin Liu and CongFeng Qiao, The parametric symmetry and numbers of the entangled class of 2 × M × N system, SCIENCE CHINA PHYSICS, MECHANICS & ASTRONOMY, Volume 54, Number 8, 1471-1475, DOI: 10.1007/s11433-011-4395-9; http://www.springerlink.com/content/24g51u87527017u7/. Nov 03 2011: I now have a copy of this paper. (DONE)
  18. (DONE) The following paper apparently references the OEIS, but I do not have access to it. If it contains a new sequence then that should be added to the OEIS. If it cites an existing sequence then we should add a reference from that sequence to this paper. Can someone look into this? — N. J. A. Sloane, Oct 28 2011. The paper is: Eddie Cheng, Ke Qiu and Zhizhang Shen, On the surface area of the augmented cubes, J. of Supercomputing, DOI: 10.1007/s11227-011-0641-1; http://www.springerlink.com/content/980453w252uvn23j/. Nov 03: I now have a copy of this paper. (DONE)
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