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 A295039 #4 Nov 12 2017 20:05:04 %S A295039 37,2735,104096,4738235,209181266,9248214732,411280569141, %T A295039 18227207589288,807975522778623,35828949243544333,1588724655137268304, %U A295039 70444327993290622210,3123514826860958239480,138498446900583005504125 %N A295039 Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 2 1s. %C A295039 Column 7 of A295040. %H A295039 R. H. Hardin, <a href="/A295039/b295039.txt">Table of n, a(n) for n = 1..210</a> %e A295039 Some solutions for n=3 %e A295039 ..0..0..0..1..1..1..0. .0..0..1..1..0..0..0. .1..1..0..0..0..0..0 %e A295039 ..0..0..0..0..0..1..0. .1..0..0..0..0..1..1. .1..1..0..1..1..1..0 %e A295039 ..1..1..0..0..0..1..0. .1..1..1..1..0..0..1. .0..0..0..0..0..1..1 %Y A295039 Cf. A295040. %K A295039 nonn %O A295039 1,1 %A A295039 _R. H. Hardin_, Nov 12 2017