A029995 Squares which are palindromes in base 9.

0, 1, 4, 100, 400, 6724, 8281, 10000, 26896, 532900, 672400, 2131600, 43059844, 44129449, 45212176, 53290000, 54479161, 55681444, 172239376, 186104164, 186595600, 203946961, 2921402500, 3486902500, 3583219600

Offset: 1

Author

Patrick De Geest

Keywords

• nonn
• base

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..52
• Patrick De Geest, Palindromic Squares in bases 2 to 17

Crossrefs

Cf. A002779, A029734, A029738, A029806, A029983, A029985, A029987, A029989, A029991, A029993, A029997, A029999, A030074, A030075.

Programs

Mathematica

pal9Q[n_]:=Module[{idn9=IntegerDigits[n,9]},idn9==Reverse[idn9]]; Select[ Range[0,60000]^2,pal9Q] (* Harvey P. Dale, Nov 12 2011 *)