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A156317
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Numbers which are perfect squares and either form equal or larger perfect squares when reversed
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0
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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
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listen;
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OFFSET
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1,3
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COMMENTS
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Subsequence of A061457 (similar definition but without the "equal or larger" condition). - Michel Marcus, Apr 25 2015
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LINKS
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Table of n, a(n) for n=1..34.
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.
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PROG
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(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
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CROSSREFS
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Cf. A061457.
Sequence in context: A042381 A230743 A033294 * A115676 A115667 A229971
Adjacent sequences: A156314 A156315 A156316 * A156318 A156319 A156320
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KEYWORD
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nonn,base
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AUTHOR
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Gaurav Kumar, Feb 07 2009
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EXTENSIONS
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Offset changed to 1 by Michel Marcus, Apr 25 2015
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STATUS
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approved
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