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 A053426 #7 Dec 23 2021 21:50:27 %S A053426 1,1,4,35,10688,1533771392,234249157811872000, %T A053426 128777207192421762546956433408, %U A053426 1031041719465866666816675423468078224724119552 %N A053426 Pure 2-complexes on n nodes with at most 3 multiple 2-simplexes. %Y A053426 Cf. A000665, A337884. %K A053426 easy,nonn %O A053426 1,3 %A A053426 _Vladeta Jovovic_, Jan 11 2000