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 A301614 #4 Mar 24 2018 11:41:56 %S A301614 8,1172,72758,4422826,271301458,16632517333,1019565752074, %T A301614 62500458737127,3831336753439723,234864521959895889, %U A301614 14397413152054371201,882574864133207632568,54102660842288578973363,3316543531108585833444946 %N A301614 Number of nX7 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero. %C A301614 Column 7 of A301615. %H A301614 R. H. Hardin, <a href="/A301614/b301614.txt">Table of n, a(n) for n = 1..210</a> %e A301614 Some solutions for n=5 %e A301614 ..0..0..0..1..1..0..0. .0..0..0..0..1..1..1. .0..0..0..1..1..0..0 %e A301614 ..0..0..1..1..1..1..1. .0..0..1..0..1..0..0. .0..0..1..0..1..0..0 %e A301614 ..0..0..1..0..0..1..1. .0..0..1..0..1..0..1. .0..0..1..0..0..1..0 %e A301614 ..0..0..1..1..1..0..1. .0..0..1..0..0..1..1. .0..0..1..0..0..1..1 %e A301614 ..0..0..0..1..0..0..0. .0..0..0..0..0..1..1. .0..0..0..1..1..1..1 %Y A301614 Cf. A301615. %K A301614 nonn %O A301614 1,1 %A A301614 _R. H. Hardin_, Mar 24 2018