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 A360210 #17 Feb 17 2023 16:48:56 %S A360210 1,4,5,6,7,8,9,10,11,13,14,15,16 %N A360210 Indices of squares in A068869. %C A360210 a(14) > 30000. - _Michel Marcus_, Jan 30 2023 %e A360210 5 is a term because A068869(5) = 1 is a square; %e A360210 8 is a term because A068869(8) = 81 is a square. %o A360210 (PARI) isok(n) = issquare((sqrtint(n!-1)+1)^2-n!); \\ _Michel Marcus_, Jan 30 2023 %Y A360210 Cf. A068869. %K A360210 nonn,more %O A360210 1,2 %A A360210 _Alexander R. Povolotsky_, Jan 29 2023