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A263612
Palindromes in base 5 which are also squares.
3
0, 1, 4, 121, 10201, 12321, 114411, 1002001, 1234321, 100020001, 102030201, 121242121, 131141131, 10000200001, 10221412201, 12102420121, 131441144131, 1000002000001, 1002003002001, 1020304030201, 1143442443411, 1210024200121, 4133144413314, 4342230322434, 13431400413431, 100000020000001
OFFSET
1,3
COMMENTS
Terms displayed in base 5. - Harvey P. Dale, Jan 10 2023
LINKS
G. J. Simmons, On palindromic squares of non-palindromic numbers, J. Rec. Math., 5 (No. 1, 1972), 11-19. [Annotated scanned copy]
MATHEMATICA
FromDigits[IntegerDigits[#, 5]]&/@Select[Range[0, 100000]^2, IntegerDigits[ #, 5] == Reverse[ IntegerDigits[ #, 5]]&] (* Harvey P. Dale, Jan 10 2023 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
N. J. A. Sloane, Oct 23 2015
STATUS
approved