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 A302669 #4 Apr 11 2018 11:59:03 %S A302669 8,1934,15569,251254,3204956,46360666,637088915,8880747825, %T A302669 123521424862,1717557375519,23910961429217,332517383714540, %U A302669 4627380566545690,64369973050145418,895641924918067374,12460311385203779872 %N A302669 Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302669 Column 7 of A302670. %H A302669 R. H. Hardin, <a href="/A302669/b302669.txt">Table of n, a(n) for n = 1..210</a> %e A302669 Some solutions for n=5 %e A302669 ..0..0..0..1..0..0..0. .0..1..1..1..1..1..0. .0..0..0..1..0..0..0 %e A302669 ..0..1..1..0..1..1..0. .0..0..0..1..0..0..1. .0..1..1..1..0..1..1 %e A302669 ..1..0..1..1..1..0..0. .1..1..1..1..0..1..1. .0..0..1..0..0..1..1 %e A302669 ..0..0..1..0..1..1..0. .0..0..1..0..0..0..1. .0..0..1..0..1..1..0 %e A302669 ..0..0..0..1..0..0..0. .0..0..0..1..1..1..0. .0..0..1..1..0..0..0 %Y A302669 Cf. A302670. %K A302669 nonn %O A302669 1,1 %A A302669 _R. H. Hardin_, Apr 11 2018