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 A269058 #4 Feb 18 2016 11:43:27 %S A269058 2187,29646,464250,9779808,187575858,3726221592,71430596250, %T A269058 1369456711662,25864594357554,485843586726426,9051481373536698, %U A269058 167744789740348134,3091817487227619306,56742145362259364580 %N A269058 Number of 7Xn 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once. %C A269058 Row 7 of A269052. %H A269058 R. H. Hardin, <a href="/A269058/b269058.txt">Table of n, a(n) for n = 1..210</a> %H A269058 R. H. Hardin, <a href="/A269058/a269058.txt">Empirical recurrence of order 92</a> %F A269058 Empirical recurrence of order 92 (see link above) %e A269058 Some solutions for n=2 %e A269058 ..2..1. .0..0. .2..2. .2..2. .2..1. .2..2. .2..1. .2..1. .1..2. .2..2 %e A269058 ..0..1. .0..1. .2..2. .1..0. .0..1. .1..2. .0..1. .0..1. .2..2. .1..2 %e A269058 ..2..1. .0..0. .1..1. .1..0. .0..1. .2..2. .0..1. .2..1. .1..2. .2..2 %e A269058 ..2..1. .1..0. .2..2. .1..0. .0..1. .1..2. .0..1. .2..1. .1..2. .2..2 %e A269058 ..0..0. .1..0. .1..2. .1..2. .0..0. .2..2. .0..0. .0..0. .2..1. .1..2 %e A269058 ..1..0. .2..2. .1..0. .1..2. .0..0. .2..1. .2..1. .1..0. .0..1. .2..2 %e A269058 ..1..0. .1..2. .1..2. .1..0. .0..0. .0..1. .0..1. .0..0. .0..1. .2..1 %Y A269058 Cf. A269052. %K A269058 nonn %O A269058 1,1 %A A269058 _R. H. Hardin_, Feb 18 2016