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 A302526 #4 Apr 09 2018 09:23:20 %S A302526 5,45,290,1977,23909,182773,1551340,18089458,155010391,1441103898, %T A302526 14993036510,137595549895,1311553678481,12995883033340, %U A302526 122771875897789,1178882157960810,11465157388913564,109566686589917765 %N A302526 Number of nX6 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302526 Column 6 of A302528. %H A302526 R. H. Hardin, <a href="/A302526/b302526.txt">Table of n, a(n) for n = 1..210</a> %e A302526 Some solutions for n=5 %e A302526 ..0..0..1..0..1..1. .0..1..0..0..1..0. .0..1..1..0..1..1. .0..0..1..0..0..1 %e A302526 ..1..1..1..0..0..1. .1..0..1..1..0..1. .0..0..0..0..0..0. .0..0..1..1..1..1 %e A302526 ..0..0..1..0..1..0. .1..1..1..1..1..1. .1..1..0..0..0..1. .1..1..1..0..1..1 %e A302526 ..0..0..1..1..0..0. .1..1..0..1..1..0. .1..0..0..1..1..0. .0..0..1..0..0..1 %e A302526 ..0..1..0..0..1..0. .0..0..1..0..0..1. .0..1..0..1..0..1. .0..1..1..0..1..0 %Y A302526 Cf. A302528. %K A302526 nonn %O A302526 1,1 %A A302526 _R. H. Hardin_, Apr 09 2018