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 A295410 #7 Apr 19 2020 23:52:39 %S A295410 1,10,234,19026,5741797,6093564449,23025368248778,309978055996363953, %T A295410 14848281990251202621848,2531566579339095935434773023, %U A295410 1536279445900820560553369496441851 %N A295410 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 3 1's. %C A295410 Diagonal of A295416. %H A295410 R. H. Hardin, <a href="/A295410/b295410.txt">Table of n, a(n) for n = 1..12</a> %e A295410 Some solutions for n=5 %e A295410 ..0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0 %e A295410 ..0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..1. .1..0..0..0..0 %e A295410 ..1..1..1..0..0. .0..0..1..1..0. .0..0..1..0..1. .1..1..0..0..0 %e A295410 ..0..1..0..1..0. .1..1..0..1..0. .1..1..1..0..0. .0..1..0..0..0 %e A295410 ..0..1..0..1..1. .1..0..0..1..0. .0..1..1..0..0. .0..1..0..1..1 %Y A295410 Cf. A295416. %K A295410 nonn %O A295410 1,2 %A A295410 _R. H. Hardin_, Nov 22 2017