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 A302147 #4 Apr 02 2018 14:25:31 %S A302147 1,3,11,56,289,1529,8152,43676,234707,1264018,6818793,36833925, %T A302147 199192142,1078202540,5840738361,31660718262,171717441011, %U A302147 931774434881,5057989479520,27465580937300,149183431937487,810502022734382 %N A302147 Number of nX5 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. %C A302147 Column 5 of A302150. %H A302147 R. H. Hardin, <a href="/A302147/b302147.txt">Table of n, a(n) for n = 1..210</a> %F A302147 Empirical: a(n) = 14*a(n-1) -65*a(n-2) +88*a(n-3) +132*a(n-4) -362*a(n-5) -39*a(n-6) +438*a(n-7) -19*a(n-8) -208*a(n-9) -16*a(n-10) +26*a(n-11) +4*a(n-12) %e A302147 Some solutions for n=5 %e A302147 ..0..1..1..1..0. .0..1..1..1..1. .0..1..1..0..0. .0..1..1..1..1 %e A302147 ..1..1..1..1..1. .1..1..1..1..0. .1..1..0..0..1. .1..1..1..1..1 %e A302147 ..1..1..1..1..0. .0..1..1..1..0. .1..1..0..0..0. .1..1..0..1..1 %e A302147 ..1..1..1..1..1. .1..1..1..1..1. .1..1..1..0..0. .1..1..1..1..1 %e A302147 ..0..1..1..1..0. .0..1..1..1..0. .1..1..0..0..1. .1..1..1..1..0 %Y A302147 Cf. A302150. %K A302147 nonn %O A302147 1,2 %A A302147 _R. H. Hardin_, Apr 02 2018