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 A230679 #6 Jun 18 2022 17:26:15 %S A230679 0,2247,251595,28368687,4022141121,559929294657,77282148036051, %T A230679 10681855554910983,1476794401334027865,204155617303878631797, %U A230679 28222820785777362856803,3901584177313433415004191 %N A230679 Number of 5 X n 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j). %C A230679 Row 5 of A230675. %H A230679 R. H. Hardin, <a href="/A230679/b230679.txt">Table of n, a(n) for n = 1..210</a> %e A230679 Some solutions for n=3 %e A230679 ..0..2..1....1..0..2....0..2..0....1..0..1....1..0..1....0..0..2....0..1..1 %e A230679 ..1..1..0....1..1..2....0..2..0....1..1..2....2..1..2....0..2..0....1..2..2 %e A230679 ..0..0..0....2..2..2....1..1..2....2..0..1....0..1..0....2..0..2....2..0..2 %e A230679 ..2..2..2....0..0..1....2..0..2....2..0..2....0..2..1....0..2..0....0..1..2 %e A230679 ..0..1..1....1..1..2....2..2..0....0..2..0....0..0..2....1..1..0....1..2..0 %Y A230679 Cf. A230675. %K A230679 nonn %O A230679 1,2 %A A230679 _R. H. Hardin_, Oct 27 2013