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 A300214 #4 Feb 28 2018 14:22:11 %S A300214 64,8192,629440,54246856,4666136435,402932952786,34824178698922, %T A300214 3010162276020151,260210978826555172,22494096787493774522, %U A300214 1944522379136741443363,168096182839942928684790 %N A300214 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. %C A300214 Column 7 of A300215. %H A300214 R. H. Hardin, <a href="/A300214/b300214.txt">Table of n, a(n) for n = 1..210</a> %e A300214 Some solutions for n=5 %e A300214 ..0..0..0..0..1..0..1. .0..0..0..1..0..0..0. .0..0..0..1..1..0..1 %e A300214 ..0..0..0..0..0..1..1. .0..0..0..0..1..1..1. .0..0..0..0..1..1..1 %e A300214 ..0..0..0..0..0..1..0. .0..0..0..0..1..1..0. .0..0..0..0..0..0..0 %e A300214 ..0..0..0..1..0..1..0. .0..0..0..1..0..0..1. .0..0..0..1..1..1..1 %e A300214 ..0..0..0..0..1..0..1. .0..0..0..0..0..1..1. .0..0..0..0..0..1..0 %Y A300214 Cf. A300215. %K A300214 nonn %O A300214 1,1 %A A300214 _R. H. Hardin_, Feb 28 2018