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 A080976 #5 Jan 11 2024 10:57:57 %S A080976 0,3,318,49497,1593176614,306347668831,13663408341818193, %T A080976 657273036441106021420,1725515775006035094342654787041, %U A080976 397951747550111200113555298627327 %N A080976 a(n) = A080301(A080973(n)). %Y A080976 Cf. A080975. %K A080976 nonn %O A080976 0,2 %A A080976 _Antti Karttunen_, Mar 02 2003