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 A298929 #4 Jan 29 2018 08:17:02 %S A298929 0,34,14,201,666,3569,15163,77576,375845,1886321,9434661,47480566, %T A298929 237250519,1191569971,5975706525,29984756274,150481729037, %U A298929 755439602693,3791563019201,19033524132770,95544814021035,479625376201987 %N A298929 Number of nX7 0..1 arrays with every element equal to 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero. %C A298929 Column 7 of A298930. %H A298929 R. H. Hardin, <a href="/A298929/b298929.txt">Table of n, a(n) for n = 1..210</a> %e A298929 Some solutions for n=5 %e A298929 ..0..0..0..1..1..1..1. .0..0..0..1..1..0..0. .0..0..1..0..0..0..0 %e A298929 ..0..0..0..1..0..0..1. .0..0..0..1..0..1..0. .0..1..1..0..0..0..0 %e A298929 ..0..0..0..1..0..0..1. .0..0..0..1..0..0..1. .1..0..0..1..0..0..0 %e A298929 ..0..0..0..1..0..0..1. .0..0..0..1..0..1..0. .0..1..1..0..0..0..0 %e A298929 ..0..0..0..1..1..1..1. .0..0..0..1..1..0..0. .0..0..1..0..0..0..0 %Y A298929 Cf. A298930. %K A298929 nonn %O A298929 1,2 %A A298929 _R. H. Hardin_, Jan 29 2018