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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A156317 Numbers which are perfect squares and either form equal or larger perfect squares when reversed 0
0, 1, 4, 9, 121, 144, 169, 484, 676, 1089, 10201, 10404, 10609, 12321, 12544, 12769, 14641, 14884, 40804, 44944, 69696, 94249, 698896, 1002001, 1004004, 1006009, 1022121, 1024144, 1026169, 1042441, 1044484, 1062961, 1214404, 1216609 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Subsequence of A061457 (similar definition but without the "equal or larger" condition). - Michel Marcus, Apr 25 2015
LINKS
Martianus Frederic Ezerman, Bertrand Meyer and Patrick Solé, On Polynomial Pairs of Integers, arXiv:1210.7593. 2012. - From N. J. A. Sloane, Nov 08 2012
Martianus Frederic Ezerman, Bertrand Meyer and Patrick Solé, On Polynomial Pairs of Integers, Journal of Integer Sequences, Vol. 18 (2015), Article 15.3.5.
PROG
(PARI) lista(nn) = {for (n=0, nn, sq = n^2; if (issquare(r=subst(Polrev(digits(sq)), x, 10)) && (r >= sq), print1(sq, ", ")); ); } \\ Michel Marcus, Apr 25 2015
CROSSREFS
Cf. A061457.
Sequence in context: A230743 A367075 A033294 * A115676 A115667 A229971
KEYWORD
nonn,base
AUTHOR
Gaurav Kumar, Feb 07 2009
EXTENSIONS
Offset changed to 1 by Michel Marcus, Apr 25 2015
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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 29 03:03 EST 2023. Contains 367422 sequences. (Running on oeis4.)