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 A300808 #4 Mar 13 2018 07:52:50 %S A300808 16,401,5908,90980,1415898,22066384,343667594,5352803078,83370618870, %T A300808 1298522133491,20224807270510,315006587914766,4906307896242419, %U A300808 76417000191122495,1190214305925792113,18537892031543901060 %N A300808 Number of nX5 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. %C A300808 Column 5 of A300811. %H A300808 R. H. Hardin, <a href="/A300808/b300808.txt">Table of n, a(n) for n = 1..210</a> %e A300808 Some solutions for n=5 %e A300808 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..1 %e A300808 ..1..0..1..1..0. .1..1..1..0..1. .1..1..1..1..0. .0..1..0..0..1 %e A300808 ..0..1..0..1..1. .0..0..1..0..0. .1..0..0..1..1. .0..1..1..0..0 %e A300808 ..1..0..1..0..0. .1..0..1..1..0. .1..1..0..0..0. .1..0..1..0..1 %e A300808 ..1..1..0..1..1. .0..0..0..1..1. .1..1..0..1..0. .0..1..1..0..1 %Y A300808 Cf. A300811. %K A300808 nonn %O A300808 1,1 %A A300808 _R. H. Hardin_, Mar 13 2018