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 A298054 #4 Jan 11 2018 07:20:10 %S A298054 8,95,63,240,422,780,1708,3362,6794,14943,29523,61474,128150,264417, %T A298054 548393,1137867,2348710,4866530,10091166,20917294,43349064,89869896, %U A298054 186296604,386177081,800695527,1660420377,3442732936,7137995410 %N A298054 Number of nX7 0..1 arrays with every element equal to 1, 2, 4 or 6 king-move adjacent elements, with upper left element zero. %C A298054 Column 7 of A298055. %H A298054 R. H. Hardin, <a href="/A298054/b298054.txt">Table of n, a(n) for n = 1..210</a> %e A298054 Some solutions for n=5 %e A298054 ..0..1..1..1..0..0..1. .0..0..1..1..1..0..0. .0..1..0..1..1..1..0 %e A298054 ..0..0..1..1..1..1..0. .1..1..0..0..0..1..1. .1..0..0..1..0..1..0 %e A298054 ..1..1..1..0..1..0..1. .0..0..0..1..0..0..0. .1..0..1..0..1..0..1 %e A298054 ..0..0..1..0..1..0..1. .1..1..0..1..0..1..1. .1..0..0..1..0..1..0 %e A298054 ..0..1..1..0..1..0..1. .1..0..0..1..0..0..1. .0..1..0..1..1..1..0 %Y A298054 Cf. A298055. %K A298054 nonn %O A298054 1,1 %A A298054 _R. H. Hardin_, Jan 11 2018