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 A300086 #6 Feb 25 2018 06:17:42 %S A300086 8,32,10,50,415,533,3089,13808,27523,150838,522496,1454342,6845127, %T A300086 21980047,73768036,306066774,995231232,3620422152,13873596424, %U A300086 46932637572,174895746882,644353070290,2261752653857,8438806451089 %N A300086 Number of nX5 0..1 arrays with every element equal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. %C A300086 Column 5 of A300089. %H A300086 R. H. Hardin, <a href="/A300086/b300086.txt">Table of n, a(n) for n = 1..210</a> %e A300086 Some solutions for n=5 %e A300086 ..0..0..0..0..1. .0..1..1..1..1. .0..0..1..1..0. .0..0..0..0..0 %e A300086 ..1..1..0..1..0. .1..0..1..0..0. .0..0..1..1..0. .1..1..0..1..1 %e A300086 ..0..0..0..0..0. .1..1..1..0..0. .0..0..1..1..1. .0..0..0..0..0 %e A300086 ..0..0..0..1..0. .0..1..1..1..1. .1..1..1..0..1. .1..1..1..1..1 %e A300086 ..0..0..0..1..0. .0..1..1..1..1. .1..1..1..0..1. .1..1..1..1..1 %Y A300086 Cf. A300089. %K A300086 nonn %O A300086 1,1 %A A300086 _R. H. Hardin_, Feb 24 2018