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 A302276 #7 Apr 05 2018 04:09:37 %S A302276 5,45,162,649,3621,15862,69601,385242,1809350,8397586,43630510, %T A302276 211879132,1010098204,5093387513,24992533872,120955915176, %U A302276 601661729016,2960280723199,14445754762414,71411159890125,351516742426348 %N A302276 Number of n X 6 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302276 Column 6 of A302278. %H A302276 R. H. Hardin, <a href="/A302276/b302276.txt">Table of n, a(n) for n = 1..210</a> %e A302276 Some solutions for n=5: %e A302276 0 1 0 0 0 1 0 0 0 0 1 1 0 1 1 1 1 1 0 0 1 0 0 0 %e A302276 0 0 1 1 1 0 1 1 1 1 0 0 1 0 0 0 0 0 0 1 1 0 1 0 %e A302276 1 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 1 %e A302276 0 0 0 1 0 0 1 0 0 0 1 0 1 0 0 0 1 0 1 1 1 0 0 0 %e A302276 0 1 1 0 1 1 0 1 1 1 0 1 1 1 0 1 1 1 0 0 0 1 1 0 %Y A302276 Cf. A302278. %K A302276 nonn %O A302276 1,1 %A A302276 _R. H. Hardin_, Apr 04 2018