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 A302970 #4 Apr 16 2018 11:58:52 %S A302970 64,8192,133757,3157171,63612987,1365216668,28906043997,610488691748, %T A302970 12956909898199,274201107406761,5808903569877147,123055467606278343, %U A302970 2606329081200670585,55211783952761651310,1169521808389101196131 %N A302970 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302970 Row 7 of A302965. %H A302970 R. H. Hardin, <a href="/A302970/b302970.txt">Table of n, a(n) for n = 1..210</a> %e A302970 Some solutions for n=5 %e A302970 ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0 %e A302970 ..0..0..1..1..1. .0..0..1..1..0. .0..0..1..1..1. .0..0..1..1..0 %e A302970 ..1..0..1..0..0. .1..0..1..0..0. .1..0..1..0..0. .1..0..1..0..1 %e A302970 ..0..1..0..1..1. .1..0..1..0..0. .1..0..1..0..1. .1..0..0..1..0 %e A302970 ..0..1..0..0..1. .0..0..1..1..0. .0..1..0..1..0. .1..1..0..1..0 %e A302970 ..1..1..0..1..1. .0..1..0..0..0. .1..1..0..1..0. .0..1..0..1..0 %e A302970 ..1..0..0..1..1. .0..1..1..1..1. .0..1..1..0..1. .1..0..1..1..1 %Y A302970 Cf. A302965. %K A302970 nonn %O A302970 1,1 %A A302970 _R. H. Hardin_, Apr 16 2018