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 A301605 #4 Mar 24 2018 11:31:45 %S A301605 1,6,13,65,330,1297,6393,30904,154041,764894,3804884,18978589, %T A301605 94697319,472770928,2360757090,11789229577,58877258002,294049444613, %U A301605 1468594070621,7334774136424,36633069686965,182962072923069,913796219872826 %N A301605 Number of nX5 0..1 arrays with every element equal to 0, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero. %C A301605 Column 5 of A301608. %H A301605 R. H. Hardin, <a href="/A301605/b301605.txt">Table of n, a(n) for n = 1..210</a> %e A301605 Some solutions for n=5 %e A301605 ..0..0..0..1..1. .0..0..0..0..1. .0..0..0..0..1. .0..0..1..1..1 %e A301605 ..0..0..0..1..1. .0..0..1..0..0. .0..1..1..0..0. .0..0..1..1..1 %e A301605 ..0..1..0..0..0. .1..0..0..0..0. .0..1..1..0..0. .0..1..0..0..0 %e A301605 ..0..0..0..1..0. .0..0..1..1..1. .0..0..0..1..1. .0..0..0..1..0 %e A301605 ..0..0..0..0..0. .0..0..1..1..1. .1..0..0..1..1. .0..0..0..0..0 %Y A301605 Cf. A301608. %K A301605 nonn %O A301605 1,2 %A A301605 _R. H. Hardin_, Mar 24 2018