This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A029997 #22 Feb 10 2025 21:35:03
%S A029997 0,1,4,9,36,144,576,676,5184,7056,14884,17689,20736,59536,65025,77841,
%T A029997 145924,535824,1774224,2143296,2547216,5827396,7096896,7817616,
%U A029997 9375844,20034576,63872064,214388164,217946169,221533456,255488256,259371025
%N A029997 Squares which are palindromes in base 11.
%H A029997 Vincenzo Librandi and Chai Wah Wu, <a href="/A029997/b029997.txt">Table of n, a(n) for n = 1..129</a> First 60 terms from Vincenzo Librandi.
%H A029997 Patrick De Geest, <a href="https://www.worldofnumbers.com/nobase10pg2.htm">Palindromic Squares in bases 2 to 17</a>
%t A029997 pb11Q[n_]:=Module[{idn11=IntegerDigits[n,11]},idn11==Reverse[idn11]]; Select[Range[0,17000]^2,pb11Q] (* _Harvey P. Dale_, Jul 23 2014 *)
%o A029997 (Python)
%o A029997 from gmpy2 import digits
%o A029997 A029997_list = [n for n in (x**2 for x in range(10**7)) if digits(n,11) == digits(n,11)[::-1]]
%o A029997 # _Chai Wah Wu_, Dec 01 2014
%Y A029997 Cf. A002779, A029734, A029738, A029806, A029983, A029985, A029987, A029989, A029991, A029993, A029995, A029999, A030074, A030075.
%K A029997 nonn,base
%O A029997 1,3
%A A029997 _Patrick De Geest_