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 A030138 #16 Mar 16 2017 01:48:01 %S A030138 1,1,1,4,6,14,26,58,109,225,359,532,549,433,214,89,20,6,1,1 %N A030138 Number of one-sided triangular n-ominoes (or triominoes) on the icosahedron. %D A030138 Daniel Johnson-Chyzhykov, G Menon, The Building Game: From Enumerative Combinatorics to Conformational Diffusion %Y A030138 Cf. A030137. %K A030138 nonn,fini,full %O A030138 1,4 %A A030138 _David W. Wilson_