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A029989
Squares which are palindromes in base 5.
16
0, 1, 4, 36, 676, 961, 4356, 15876, 24336, 391876, 423801, 571536, 646416, 9771876, 10732176, 14107536, 81974916, 244171876, 248094001, 264908176, 339812356, 351787536, 1061326084, 1167042244, 2181263616, 6103671876
OFFSET
1,3
LINKS
Patrick 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
pal5Q[n_]:=Module[{idn5=IntegerDigits[n, 5]}, idn5==Reverse[idn5]]; Select[ Range[0, 80000]^2, pal5Q] (* Harvey P. Dale, May 05 2012 *)
CROSSREFS
KEYWORD
nonn,base
STATUS
approved