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 A298892 #4 Jan 28 2018 09:05:41 %S A298892 0,11,4,31,219,579,1858,8891,34212,128103,538967,2219296,8764075, %T A298892 36216096,148454907,602014960,2469409541,10115533795,41307139499, %U A298892 169152390705,692711105743,2833870255179,11601723412009,47502652641814 %N A298892 Number of nX5 0..1 arrays with every element equal to 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero. %C A298892 Column 5 of A298895. %H A298892 R. H. Hardin, <a href="/A298892/b298892.txt">Table of n, a(n) for n = 1..210</a> %e A298892 Some solutions for n=7 %e A298892 ..0..0..0..1..1. .0..0..1..0..0. .0..0..1..1..0. .0..0..1..1..1 %e A298892 ..0..0..0..1..1. .0..1..1..1..0. .0..1..1..0..0. .0..0..1..1..1 %e A298892 ..1..1..0..0..0. .0..1..0..1..0. .1..1..1..1..1. .0..0..1..1..1 %e A298892 ..0..1..0..0..0. .0..0..1..0..0. .0..0..1..1..1. .1..1..1..0..0 %e A298892 ..0..0..0..0..0. .1..1..1..1..1. .0..0..1..1..1. .1..1..0..1..0 %e A298892 ..0..1..0..0..0. .1..1..1..0..1. .0..0..1..1..1. .1..1..0..1..1 %e A298892 ..1..1..0..0..0. .1..1..1..0..0. .0..0..1..1..1. .1..1..0..0..1 %Y A298892 Cf. A298895. %K A298892 nonn %O A298892 1,2 %A A298892 _R. H. Hardin_, Jan 28 2018