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 A269192 #4 Feb 20 2016 09:44:30 %S A269192 2592,168252,16629436,1567933676,145995171708,13377149358556, %T A269192 1209655310225276,108189166610803900,9588279038550679252, %U A269192 843282890295576773948,73686476215233408557636,6403039770601949503501428 %N A269192 Number of nX6 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three no more than once. %C A269192 Column 6 of A269194. %H A269192 R. H. Hardin, <a href="/A269192/b269192.txt">Table of n, a(n) for n = 1..210</a> %e A269192 Some solutions for n=2 %e A269192 ..2..3..3..1..1..1. .1..0..0..2..2..3. .0..0..0..1..0..2. .2..3..3..3..1..1 %e A269192 ..3..2..2..3..3..3. .0..1..0..2..3..1. .1..0..0..0..0..0. .3..3..1..1..1..1 %Y A269192 Cf. A269194. %K A269192 nonn %O A269192 1,1 %A A269192 _R. H. Hardin_, Feb 20 2016