The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A152888 Partial sums of length of terms in A081368 where A081368(1) is set to 0. 1
 0, 2, 5, 9, 14, 21, 28, 36, 45, 55, 66, 77, 90, 104, 119, 135, 152, 170 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Previous name was: The sequence of powers necessary to reconstruct Exp[0] from Thanh Diep's sequence A081368: E=Sum[A081368[n]/10^a(n),{n,1,Length}]. REFERENCES C. Pickover, Mazes for the Mind, St. Martin's Press, NY, 1992, p. 350-351. LINKS MATHEMATICA a = {2, 71, 828, 1828, 45904, 5235360, 2874713, 52662497, 757247093, 6999595749, 66967627724, 76630353547, 5945713821785, 25166427427466, 391932003059921, 8174135966290435, 72900334295260595, 630738132328627943}; b = Table[Length[IntegerDigits[a[[n]]]], {n, 1, Length[a]}]; c = Table[Sum[b[[m]], {m, 1, n}] - 1, {n, 1, Length[b]}] Sum[a[[n]]/10^(c[[n]]), {n, 1, Length[a]}]; N[% - E, 100] PROG (PARI) v=[71, 828, 1828, 45904, 5235360, 2874713, 52662497, 757247093, 6999595749, 66967627724, 76630353547, 5945713821785, 25166427427466, 391932003059921, 8174135966290435, 72900334295260595, 630738132328627943]; concat([0], vector(#v, n, sum(j=1, n, #digits(v[j])))) \\ Joerg Arndt, Aug 13 2013 CROSSREFS Sequence in context: A006482 A191170 A191123 * A139423 A026053 A276031 Adjacent sequences: A152885 A152886 A152887 * A152889 A152890 A152891 KEYWORD nonn,base,less AUTHOR Roger L. Bagula, Dec 14 2008 EXTENSIONS Edited by Joerg Arndt and Michel Marcus, Aug 13 2013 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 8 07:30 EST 2022. Contains 358677 sequences. (Running on oeis4.)