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 A113725 #8 Jun 26 2019 02:46:30 %S A113725 1,2,8,56,984,87848,115679160 %N A113725 The number of terms in row n of A113724 when interpreted as a triangle. %C A113725 A113724 is a variant of Golomb's sequence using even numbers: a(n) is the number of times 2*n+2 occurs, starting with a(1) = 2. %Y A113725 Cf. A001462 (Golomb's sequence), A113722, A113723, A113724, A113676. %K A113725 nonn,more %O A113725 1,2 %A A113725 _Floor van Lamoen_ and _Paul D. Hanna_, Nov 08 2005