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 A230174 #6 Jun 02 2025 08:41:40 %S A230174 33,73417,33908253,17072965263,8666440899433,4381081731832923, %T A230174 2222884630214739547,1127411488744987043611,571557326062169407226463, %U A230174 289782351408303721961315329,146927686537779809297483679829 %N A230174 Number of nX6 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value 2-x(i,j). %C A230174 Column 6 of A230176 %H A230174 R. H. Hardin, <a href="/A230174/b230174.txt">Table of n, a(n) for n = 1..137</a> %e A230174 Some solutions for n=3 %e A230174 ..0..0..0..0..1..1....0..0..0..2..0..1....0..0..0..2..2..0....0..0..0..2..2..0 %e A230174 ..2..1..0..2..0..0....2..1..0..1..0..1....2..1..0..1..0..0....2..1..0..2..1..2 %e A230174 ..1..2..1..1..2..0....1..2..1..0..2..0....1..1..2..1..1..1....0..1..2..0..1..1 %K A230174 nonn %O A230174 1,1 %A A230174 _R. H. Hardin_, Oct 11 2013