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 A307619 #17 Aug 23 2019 13:44:28 %S A307619 5,6,3,5,15,21,7,14,22,44,65,13,51,51,114,138,46,46,8 %N A307619 Number of times the n-th distinct term in A307616 appears. %F A307619 a(n) = A308611(n) - A308611(n-1) for n > 1. %Y A307619 Cf. A307616, A308611. %K A307619 nonn,more %O A307619 1,1 %A A307619 _Jack Zhang_, Apr 18 2019 %E A307619 a(11)-a(19) from _Rémy Sigrist_, Aug 23 2019