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 A318592 #4 Aug 29 2018 17:48:38
%S A318592 1,1,6,55,460,3876,33594,296010,2630044,23535820,211911256,1917334783,
%T A318592 17417167156,158753389900,1451182694940,13298522298180,
%U A318592 122131736900380,1123787895356412,10358022417860040,95615237915961100,883829035764950960,8179808679272664720
%N A318592 Number of n-member subsets of [4*n] whose elements sum to a multiple of four.
%H A318592 Alois P. Heinz, <a href="/A318592/b318592.txt">Table of n, a(n) for n = 0..1000</a>
%e A318592 a(2) = 6: {1,3}, {1,7}, {2,6}, {3,5}, {4,8}, {5,7}.
%Y A318592 Column k=4 of A318557.
%K A318592 nonn
%O A318592 0,3
%A A318592 _Alois P. Heinz_, Aug 29 2018