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 A300369 #4 Mar 04 2018 09:08:07 %S A300369 0,3,3,4,32,92,270,1262,3561,13976,48859,173602,622502,2233811, %T A300369 7882027,28343929,100832747,360076171,1284751998,4584944102, %U A300369 16356781324,58381988677,208293028674,743376640816,2652427350327,9465170814378 %N A300369 Number of nX5 0..1 arrays with every element equal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. %C A300369 Column 5 of A300372. %H A300369 R. H. Hardin, <a href="/A300369/b300369.txt">Table of n, a(n) for n = 1..210</a> %e A300369 Some solutions for n=5 %e A300369 ..0..0..0..1..1. .0..0..0..0..1. .0..0..1..0..0. .0..0..0..0..1 %e A300369 ..0..1..0..1..1. .0..1..0..1..1. .0..1..1..0..1. .0..1..0..1..1 %e A300369 ..1..1..0..0..0. .1..1..0..0..0. .0..0..0..1..1. .1..1..1..0..0 %e A300369 ..0..0..1..1..0. .0..0..1..0..1. .1..1..0..0..1. .0..0..1..0..1 %e A300369 ..0..1..1..0..0. .0..1..1..1..1. .1..1..0..1..1. .0..0..1..1..1 %Y A300369 Cf. A300372. %K A300369 nonn %O A300369 1,2 %A A300369 _R. H. Hardin_, Mar 04 2018