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 A269185 #4 Feb 20 2016 09:14:09 %S A269185 5832,739008,154606864,29881402560,5665397992608,1052109184130840, %T A269185 192247800095048896,34666986301328823344,6183899646434421899984, %U A269185 1093211509437280016564192,191809173606551182685393776 %N A269185 Number of nX7 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three exactly once. %C A269185 Column 7 of A269186. %H A269185 R. H. Hardin, <a href="/A269185/b269185.txt">Table of n, a(n) for n = 1..210</a> %e A269185 Some solutions for n=1 %e A269185 ..3..0..0..1..0..2..0. .3..2..2..1..3..1..1. .0..2..1..1..0..1..1 %Y A269185 Cf. A269186. %K A269185 nonn %O A269185 1,1 %A A269185 _R. H. Hardin_, Feb 20 2016