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 A303083 #6 Jan 31 2022 21:45:30 %S A303083 1,496,2525,33152,636070,13375327,266882021,5754725245,125608726910, %T A303083 2751441878716,60560951633302,1338653889825967,29617783009064771, %U A303083 655764759948936409,14528234528855832400,321957970196713225956 %N A303083 Number of n X 7 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303083 Column 7 of A303084. %H A303083 R. H. Hardin, <a href="/A303083/b303083.txt">Table of n, a(n) for n = 1..210</a> %e A303083 Some solutions for n=5 %e A303083 ..0..0..1..0..0..0..0. .0..0..1..1..0..0..1. .0..0..1..1..0..0..1 %e A303083 ..0..0..0..0..0..0..1. .0..0..1..1..0..0..0. .0..0..0..1..1..0..0 %e A303083 ..0..0..1..0..1..0..0. .0..0..0..1..1..0..1. .0..0..1..0..1..1..0 %e A303083 ..1..0..1..0..0..0..1. .0..0..1..1..0..0..0. .0..0..1..1..0..0..0 %e A303083 ..0..0..0..0..1..0..0. .1..0..0..0..0..0..1. .0..0..0..1..1..0..1 %Y A303083 Cf. A303084. %K A303083 nonn %O A303083 1,2 %A A303083 _R. H. Hardin_, Apr 18 2018