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 A297589 #6 May 03 2020 15:33:15 %S A297589 1,5,25,154,3747,163704,9403199,1120526916,303459238317, %T A297589 138838185786076,112146192906098209,184312505263036081408, %U A297589 579679725644521049265576,3298268036530237426659387766 %N A297589 Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 5 neighboring 1's. %C A297589 Diagonal of A297595. %e A297589 Some solutions for n=6 %e A297589 ..0..1..1..0..1..1. .0..0..0..0..0..0. .0..0..0..0..1..0. .0..0..0..0..0..0 %e A297589 ..0..0..0..0..0..0. .1..0..1..0..1..1. .0..1..1..0..0..1. .0..0..0..1..1..0 %e A297589 ..1..1..0..0..0..0. .1..1..0..0..0..0. .0..0..0..0..0..0. .1..1..0..0..0..0 %e A297589 ..0..0..0..0..0..0. .1..0..1..0..0..0. .1..0..0..0..0..0. .0..0..0..0..0..1 %e A297589 ..1..0..0..0..1..0. .1..0..0..0..0..0. .0..1..0..0..1..1. .0..0..0..0..1..0 %e A297589 ..0..1..0..0..0..1. .0..1..0..1..1..0. .0..0..0..0..0..0. .0..1..1..0..0..0 %Y A297589 Cf. A297595. %K A297589 nonn %O A297589 1,2 %A A297589 _R. H. Hardin_, Jan 01 2018