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 A302264 #4 Apr 04 2018 12:50:01 %S A302264 64,5135,96004,1984001,41994750,893462062,18964765818,402597400706, %T A302264 8547940665506,181527035285787,3854821615967821,81862339042940669, %U A302264 1738453613332468089,36918733850285685708,784027054636001040433 %N A302264 Number of nX7 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. %C A302264 Column 7 of A302265. %H A302264 R. H. Hardin, <a href="/A302264/b302264.txt">Table of n, a(n) for n = 1..210</a> %e A302264 Some solutions for n=5 %e A302264 ..0..1..1..1..0..1..1. .0..1..1..1..0..0..1. .0..0..1..0..0..1..1 %e A302264 ..0..0..1..1..0..1..0. .0..0..1..0..0..1..0. .0..0..1..0..0..1..0 %e A302264 ..0..0..1..0..0..1..0. .0..0..1..1..0..1..0. .0..0..1..1..0..1..1 %e A302264 ..0..0..1..1..0..1..0. .0..0..1..1..0..1..0. .0..0..1..1..0..1..1 %e A302264 ..0..1..1..0..0..1..0. .0..1..1..0..0..1..1. .0..1..1..0..0..1..1 %Y A302264 Cf. A302265. %K A302264 nonn %O A302264 1,1 %A A302264 _R. H. Hardin_, Apr 04 2018