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 A302380 #4 Apr 06 2018 12:41:42 %S A302380 8,2208,127535,8334338,535192095,34271733937,2195619257236, %T A302380 140685735128595,9013655138528774,577518643711241385, %U A302380 37002236612561808562,2370775298902153257752,151898260084738496346512 %N A302380 Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302380 Column 7 of A302381. %H A302380 R. H. Hardin, <a href="/A302380/b302380.txt">Table of n, a(n) for n = 1..210</a> %e A302380 Some solutions for n=5 %e A302380 ..0..0..1..1..0..0..0. .0..0..1..1..1..0..0. .0..0..1..0..1..1..1 %e A302380 ..0..1..0..0..1..0..0. .0..1..0..1..1..0..0. .0..1..0..0..0..0..0 %e A302380 ..0..1..0..0..1..0..0. .0..1..0..0..0..0..0. .0..1..0..0..1..1..1 %e A302380 ..1..0..0..1..0..0..0. .1..0..0..1..1..0..0. .1..0..0..1..1..0..0 %e A302380 ..0..0..1..1..1..1..0. .0..0..1..1..0..1..1. .0..0..1..0..1..0..0 %Y A302380 Cf. A302381. %K A302380 nonn %O A302380 1,1 %A A302380 _R. H. Hardin_, Apr 06 2018