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 A303461 #6 Jun 07 2021 14:46:40 %S A303461 64,8192,664512,55781418,4726484016,401405461699,34135836415352, %T A303461 2903926612610439,247077958107897280,21023477490350193047, %U A303461 1788894134950802044639,152218675999461862651686 %N A303461 Number of 7 X n 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A303461 Row 7 of A303456. %H A303461 R. H. Hardin, <a href="/A303461/b303461.txt">Table of n, a(n) for n = 1..210</a> %e A303461 Some solutions for n=5 %e A303461 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A303461 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A303461 ..0..1..0..1..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A303461 ..0..0..1..0..0. .0..1..0..1..0. .1..1..1..1..1. .1..1..1..1..1 %e A303461 ..1..1..1..1..0. .1..1..1..0..1. .0..0..1..1..1. .0..0..0..1..1 %e A303461 ..1..0..0..0..1. .0..0..1..1..0. .1..0..0..1..0. .0..1..0..0..1 %e A303461 ..0..0..0..1..1. .0..1..0..1..1. .0..0..0..1..1. .1..1..1..0..1 %Y A303461 Cf. A303456. %K A303461 nonn %O A303461 1,1 %A A303461 _R. H. Hardin_, Apr 24 2018