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 A262391 #16 Sep 24 2017 02:34:10 %S A262391 0,0,0,1,2,6,34,257,2606,440564,6384634,96262938,1496225352, %T A262391 23833988129,387591510244,6415851530241,107854282197058 %N A262391 Erroneous duplicate of A000944. %e A262391 For n=4 the only possible shape is a tetrahedron with four triangle sides. %e A262391 For n=5 the only possible shapes are the square pyramid and triangular prism. %K A262391 dead %O A262391 1,5 %A A262391 _Jiazhen Tan_, Sep 21 2015