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 A121271 #2 Feb 27 2009 03:00:00
%S A121271 1,1,1,2,16,533,42175,5554128,1030941214
%N A121271 Number of different vertex-degree sequences of simple 3-uniform hypergraphs on n vertices.
%e A121271 a(3)=2 counts these two degree sequences: (0,0,0) and (1,1,1), the former corresponding to the empty 3-uniform hypergraph with no hyperedges and the latter for the 3-uniform hypergraph having the unique hyperedge {1,2,3}.
%Y A121271 Cf. A005155.
%K A121271 hard,more,nonn
%O A121271 0,4
%A A121271 Caroline Klivans and Victor Reiner (reiner(AT)math.umn.edu), Aug 23 2006