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A029985 Squares which are palindromes in base 3. 0
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; internal format)
OFFSET

1,3

LINKS

P. De Geest, Palindromic Squares

MATHEMATICA

b3pQ[n_]:=Module[{idn3=IntegerDigits[n, 3]}, idn3==Reverse[idn3]]; Select[ Range[0, 3200]^2, b3pQ] (* From Harvey P. Dale, Aug 07 2011 *)

CROSSREFS

Sequence in context: A111976 A130683 A091040 * A114023 A145823 A121142

Adjacent sequences:  A029982 A029983 A029984 * A029986 A029987 A029988

KEYWORD

nonn,base

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com)

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Last modified February 13 05:39 EST 2012. Contains 205436 sequences.