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 A303324 #4 Apr 21 2018 13:12:54 %S A303324 1,128,4,46,368,758,2956,15494,44101,190416,843033,3033091,12413910, %T A303324 51530654,201376755,814350745,3304173349,13195116320,53237817569, %U A303324 214790465512,862745046281,3476740567795,14008372152609,56369700131001 %N A303324 Number of nX7 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303324 Column 7 of A303325. %H A303324 R. H. Hardin, <a href="/A303324/b303324.txt">Table of n, a(n) for n = 1..210</a> %e A303324 Some solutions for n=5 %e A303324 ..0..1..1..1..0..0..0. .0..0..1..1..1..0..0. .0..1..0..1..1..0..0 %e A303324 ..1..1..0..1..1..0..1. .0..0..1..1..1..0..0. .1..1..1..1..0..0..1 %e A303324 ..1..0..1..0..1..0..1. .0..1..0..1..0..1..0. .0..0..0..0..0..0..0 %e A303324 ..1..1..0..1..1..0..1. .0..0..1..1..1..0..0. .1..0..1..0..0..1..1 %e A303324 ..1..1..0..1..1..0..1. .0..0..1..1..1..0..0. .0..0..0..0..1..1..0 %Y A303324 Cf. A303325. %K A303324 nonn %O A303324 1,2 %A A303324 _R. H. Hardin_, Apr 21 2018