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 A296945 #6 Apr 26 2020 21:07:47 %S A296945 1,8,45,620,37179,2640993,482228052,246430289779,233010334725043, %T A296945 513658708035556281 %N A296945 Number of n X n 0..1 arrays with each 1 adjacent to 1, 3 or 5 king-move neighboring 1's. %C A296945 Diagonal of A296952. %e A296945 Some solutions for n=5 %e A296945 ..0..1..1..0..0. .1..0..1..1..0. .0..1..0..0..0. .0..0..0..1..1 %e A296945 ..0..0..0..0..0. .1..0..0..0..0. .0..0..1..0..0. .0..0..0..1..1 %e A296945 ..0..0..0..0..0. .0..0..0..1..0. .0..0..0..0..0. .1..1..0..1..1 %e A296945 ..0..0..0..0..1. .1..1..0..0..1. .0..0..1..0..0. .1..1..0..0..0 %e A296945 ..1..1..0..1..0. .0..0..0..0..0. .0..0..1..0..0. .0..0..0..1..1 %Y A296945 Cf. A296952. %K A296945 nonn %O A296945 1,2 %A A296945 _R. H. Hardin_, Dec 22 2017