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 A029985 Squares which are palindromes in base 3. 12
 0, 1, 4, 16, 100, 121, 400, 484, 784, 1156, 3136, 6724, 7921, 12769, 23716, 26896, 59536, 68644, 238144, 274576, 532900, 570025, 643204, 743044, 1042441, 1800964, 1844164, 2131600, 4787344, 5026564, 7203856, 7376656, 9278116 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS P. De Geest, Palindromic Squares G. J. Simmons, On palindromic squares of non-palindromic numbers, J. Rec. Math., 5 (No. 1, 1972), 11-19. [Annotated scanned copy] MATHEMATICA b3pQ[n_]:=Module[{idn3=IntegerDigits[n, 3]}, idn3==Reverse[idn3]]; Select[ Range[0, 3200]^2, b3pQ] (* Harvey P. Dale, Aug 07 2011 *) CROSSREFS Cf. A029984, A263607, A263608; also A002778, A003166. Sequence in context: A236772 A209299 A091040 * A114023 A145823 A121142 Adjacent sequences:  A029982 A029983 A029984 * A029986 A029987 A029988 KEYWORD nonn,base AUTHOR STATUS approved

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Last modified October 14 00:10 EDT 2019. Contains 327990 sequences. (Running on oeis4.)