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 A298969 #4 Jan 30 2018 13:31:12 %S A298969 64,8192,581057,49885231,4200575252,356356552103,30241030285680, %T A298969 2566506415636896,217825152899921097,18487503017529807194, %U A298969 1569093086125030344062,133174005805446365581185 %N A298969 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero. %C A298969 Column 7 of A298970. %H A298969 R. H. Hardin, <a href="/A298969/b298969.txt">Table of n, a(n) for n = 1..210</a> %e A298969 Some solutions for n=5 %e A298969 ..0..0..0..0..1..1..0. .0..0..0..1..1..1..1. .0..0..0..0..0..0..0 %e A298969 ..0..1..1..0..1..1..0. .0..1..1..0..0..0..1. .0..1..1..0..1..1..0 %e A298969 ..0..0..1..0..0..1..1. .0..0..1..0..1..0..0. .0..0..1..0..0..1..0 %e A298969 ..0..0..0..0..1..0..1. .0..0..0..0..1..1..0. .0..0..0..0..1..1..0 %e A298969 ..0..1..1..1..0..0..0. .0..1..1..0..1..1..1. .0..1..1..0..0..1..0 %Y A298969 Cf. A298970. %K A298969 nonn %O A298969 1,1 %A A298969 _R. H. Hardin_, Jan 30 2018