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 A331311 #7 Jan 21 2020 18:22:49 %S A331311 1,1,1,1,1,1,1,1,3,1,1,2,1,1,1,1,1,3,1,2,1,1,1,2,1,1,3,2,1,1,1,1,1,1, %T A331311 1,1,1,1,1,2,1,1,1,2,3,1,1,2,1,1,1,2,1,3,1,2,1,1,1,1,1,1,3,1,1,1,1,2, %U A331311 1,1,1,1,1,1,1,2,1,1,1,8,1,1,1,1,1,1,1,2,1,3,1,2,1,1,1,2,1,1,3,1,1,1,1,2,1 %N A331311 a(n) = A331287(n) / A331310(n). %H A331311 Antti Karttunen, <a href="/A331311/b331311.txt">Table of n, a(n) for n = 1..65537</a> %F A331311 a(n) = A331287(n) / A331310(n) = gcd(n, A225546(n)) / gcd(n, A293442(n)). %o A331311 (PARI) A331311(n) = (A331287(n)/A331310(n)); %Y A331311 Cf. A225546, A293442, A331287, A331310, A331312. %K A331311 nonn %O A331311 1,9 %A A331311 _Antti Karttunen_, Jan 21 2020