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 A302432 #4 Apr 07 2018 17:25:28 %S A302432 64,86,207,879,2503,12527,48037,204549,775916,3358602,13687791, %T A302432 56973192,229275449,958442181,3959517524,16388638144,67033864950, %U A302432 277552341954,1148287668884,4747634176800,19530191061230,80658890197236 %N A302432 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302432 Row 7 of A302427. %H A302432 R. H. Hardin, <a href="/A302432/b302432.txt">Table of n, a(n) for n = 1..210</a> %e A302432 Some solutions for n=5 %e A302432 ..0..1..1..1..1. .0..1..1..0..1. .0..1..0..0..1. .0..1..1..1..0 %e A302432 ..1..1..1..0..0. .1..0..1..0..0. .0..1..0..1..0. .0..1..0..0..0 %e A302432 ..0..1..0..1..0. .1..0..1..0..1. .0..1..0..1..0. .0..1..0..1..0 %e A302432 ..1..1..0..1..0. .1..0..1..0..1. .1..1..0..1..1. .0..1..0..1..0 %e A302432 ..0..1..0..1..0. .1..0..1..0..1. .0..1..0..1..0. .0..1..0..1..0 %e A302432 ..0..1..0..1..0. .1..0..1..0..1. .0..1..0..1..0. .1..0..0..1..0 %e A302432 ..1..0..0..1..0. .1..1..0..0..1. .1..0..0..1..0. .1..0..1..0..0 %Y A302432 Cf. A302427. %K A302432 nonn %O A302432 1,1 %A A302432 _R. H. Hardin_, Apr 07 2018