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 A054562 #5 May 10 2013 12:44:27
%S A054562 540,65625,1272320
%N A054562 Number of labeled pure 2-complexes on n nodes (0-simplexes) with 5 2-simplexes and 13 1-simplexes.
%C A054562 Number of {T_1,T_2,...,T_k} where T_i,i=1..k are 3-subsets of an n-set such that {D | D is 2-subset of T_i for some i=1..k} has l elements; k=5,l=13.
%D A054562 V. Jovovic, On the number of two-dimensional simplicial complexes (in Russian), Metody i sistemy tekhnicheskoy diagnostiki, Vypusk 16, Mezhvuzovskiy zbornik nauchnykh trudov, Izdatelstvo Saratovskogo universiteta, 1991.
%F A054562 a(n)=540*C(n, 6)+61845*C(n, 7)+762440*C(n, 8)+...
%Y A054562 Cf. A054557.
%K A054562 more,nonn,bref
%O A054562 6,1
%A A054562 _Vladeta Jovovic_, Apr 10 2000