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 A295415 #4 Nov 22 2017 10:39:26 %S A295415 37,5854,457178,37927609,3232240913,272714953724,23025368248778, %T A295415 1945003010538968,164274708080518128,13874595126484055272, %U A295415 1171853104636801040141,98975023815069258155234 %N A295415 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 3 1s. %C A295415 Column 7 of A295416. %H A295415 R. H. Hardin, <a href="/A295415/b295415.txt">Table of n, a(n) for n = 1..210</a> %e A295415 Some solutions for n=5 %e A295415 ..0..0..0..0..1..0..0. .0..0..0..0..0..1..0. .0..0..0..0..1..1..0 %e A295415 ..0..0..0..0..1..0..0. .0..0..0..0..1..1..0. .0..0..0..0..0..0..1 %e A295415 ..0..0..0..0..0..0..0. .0..0..0..1..1..0..1. .0..0..0..0..1..1..1 %e A295415 ..0..0..1..0..0..1..1. .0..0..1..0..1..1..1. .0..0..1..0..1..0..1 %e A295415 ..0..0..1..0..0..0..1. .0..0..1..0..0..0..0. .0..0..1..0..0..0..1 %Y A295415 Cf. A295416. %K A295415 nonn %O A295415 1,1 %A A295415 _R. H. Hardin_, Nov 22 2017