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 A308250 #8 Aug 10 2019 23:31:27 %S A308250 0,1,49,64,2401,21904,118336,5764801,1297152256,22880797696, %T A308250 149429406721,3114293149696,33232930569601,2203546857570304, %U A308250 3418922510231809 %N A308250 Squares of automorphic numbers in base 12 (cf. A201919). %F A308250 Equals A201919(n)^2. %e A308250 2401 = c37_14 and sqrt(c37_14) = 37_14. Hence 2401 is in the sequence. %o A308250 (Sage) [(n * n) for n in (0..1000000) if (n * n).str(base = 14).endswith(n.str(base = 14))] %Y A308250 Cf. A201919, A237583, A308250. %K A308250 nonn,base,more %O A308250 1,3 %A A308250 _Jeremias M. Gomes_, May 17 2019