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 A302313 #4 Apr 05 2018 09:41:23 %S A302313 16,21,58,153,445,1595,4772,15249,49634,166329,547264,1812790,6026255, %T A302313 20329381,68337634,228989976,768581607,2595937574,8761489896, %U A302313 29487968631,99305798186,335393857959,1132559861889,3818247323820,12874857356305 %N A302313 Number of 5Xn 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302313 Row 5 of A302309. %H A302313 R. H. Hardin, <a href="/A302313/b302313.txt">Table of n, a(n) for n = 1..210</a> %e A302313 Some solutions for n=5 %e A302313 ..0..1..0..1..1. .0..1..1..0..1. .0..1..0..0..0. .0..1..0..1..0 %e A302313 ..1..1..0..0..0. .0..0..0..0..1. .0..1..1..1..0. .1..1..0..1..1 %e A302313 ..1..1..1..1..1. .1..1..0..1..0. .0..0..0..1..0. .0..1..0..1..0 %e A302313 ..0..1..1..0..1. .0..0..0..1..0. .1..1..1..1..1. .0..1..0..1..0 %e A302313 ..0..0..0..0..1. .0..1..1..1..0. .1..0..1..1..0. .0..1..1..0..0 %Y A302313 Cf. A302309. %K A302313 nonn %O A302313 1,1 %A A302313 _R. H. Hardin_, Apr 05 2018