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 A298659 #4 Jan 24 2018 10:11:02 %S A298659 8,95,63,322,876,2562,7964,24801,74358,242072,745571,2349275,7433849, %T A298659 23406485,73834463,233339001,735993576,2324359169,7339529089, %U A298659 23174991985,73178503209,231090268648,729735594047,2304427312579,7277098813048 %N A298659 Number of nX7 0..1 arrays with every element equal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero. %C A298659 Column 7 of A298660. %H A298659 R. H. Hardin, <a href="/A298659/b298659.txt">Table of n, a(n) for n = 1..210</a> %e A298659 Some solutions for n=5 %e A298659 ..0..1..1..0..0..0..1. .0..0..1..0..0..0..1. .0..1..0..1..0..0..1 %e A298659 ..1..0..0..0..0..1..1. .1..1..0..0..0..1..1. .1..0..1..0..1..1..1 %e A298659 ..1..0..0..0..0..0..0. .0..0..0..0..0..0..0. .1..0..0..0..1..1..1 %e A298659 ..1..0..1..0..1..0..1. .1..0..1..0..1..0..1. .1..0..0..0..1..0..1 %e A298659 ..0..0..1..0..1..0..1. .1..0..1..0..1..0..1. .0..0..0..1..1..0..0 %Y A298659 Cf. A298660. %K A298659 nonn %O A298659 1,1 %A A298659 _R. H. Hardin_, Jan 24 2018