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A029986 Numbers n such that n^2 is palindromic in base 4. 3
0, 1, 5, 17, 21, 65, 71, 83, 257, 273, 281, 317, 1025, 1055, 4097, 4161, 4193, 4401, 5157, 5179, 5221, 16385, 16511, 16865, 17239, 65537, 65793, 65921, 66753, 68695, 69521, 69777, 80739, 82053, 82171, 82309, 82885, 83301, 262145 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..39.

P. De Geest, Palindromic Squares

MATHEMATICA

Select[Range[0, 300000], IntegerDigits[#^2, 4]==Reverse[ IntegerDigits[ #^2, 4]]&] (* Harvey P. Dale, Dec 01 2015 *)

CROSSREFS

Sequence in context: A191143 A032376 A145818 * A076275 A031270 A022141

Adjacent sequences:  A029983 A029984 A029985 * A029987 A029988 A029989

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

STATUS

approved

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Last modified December 6 06:58 EST 2016. Contains 278775 sequences.