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 A302533 #6 Dec 29 2023 10:46:36 %S A302533 0,421,9091,15852,92603,1551340,16130212,82774516,506265517, %T A302533 5660323142,51739325680,335761691745,2418466197168,21927716125718, %U A302533 184725699865822,1350254421406010,10284927374810243,86141789798720948,701278900747323768 %N A302533 Number of 7 X n 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 A302533 Row 7 of A302528. %H A302533 R. H. Hardin, <a href="/A302533/b302533.txt">Table of n, a(n) for n = 1..210</a> %e A302533 Some solutions for n=5 %e A302533 ..0..1..0..1..1. .0..1..1..0..0. .0..1..0..1..0. .0..1..0..1..0 %e A302533 ..1..0..0..0..0. .0..0..1..0..0. .1..0..0..0..1. .1..0..1..0..1 %e A302533 ..0..1..1..1..0. .1..0..1..1..1. .0..1..0..1..0. .1..0..1..0..1 %e A302533 ..1..0..1..0..0. .0..1..1..0..0. .0..0..0..0..0. .0..1..1..1..0 %e A302533 ..1..1..0..1..0. .1..0..1..0..1. .0..1..1..1..1. .1..1..1..1..1 %e A302533 ..1..0..0..0..0. .0..0..1..1..1. .1..1..0..1..0. .1..0..0..0..1 %e A302533 ..0..1..0..1..1. .0..1..1..0..0. .1..0..1..0..1. .0..1..1..1..0 %Y A302533 Cf. A302528. %K A302533 nonn %O A302533 1,2 %A A302533 _R. H. Hardin_, Apr 09 2018