A029989 Squares which are palindromes in base 5.
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
Links
- Chai Wah Wu, Table of n, a(n) for n = 1..147
- Patrick De Geest, Palindromic Squares in bases 2 to 17
- G. J. Simmons, On palindromic squares of non-palindromic numbers, J. Rec. Math., 5 (No. 1, 1972), 11-19. [Annotated scanned copy]
Programs
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Mathematica
pal5Q[n_]:=Module[{idn5=IntegerDigits[n,5]},idn5==Reverse[idn5]]; Select[ Range[0,80000]^2,pal5Q] (* Harvey P. Dale, May 05 2012 *)