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 A301449 #4 Mar 21 2018 11:55:53 %S A301449 64,5536,206266,8414314,346263718,14319674594,592006690060, %T A301449 24472344492129,1011614229196954,41818633717956475, %U A301449 1728717456235095132,71462530065996111095,2954149871798731848542,122119977375690877476823 %N A301449 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. %C A301449 Column 7 of A301450. %H A301449 R. H. Hardin, <a href="/A301449/b301449.txt">Table of n, a(n) for n = 1..210</a> %e A301449 Some solutions for n=5 %e A301449 ..0..0..0..0..1..1..0. .0..0..0..0..1..0..0. .0..0..0..0..0..0..1 %e A301449 ..0..1..0..1..0..1..0. .0..1..0..1..1..1..1. .0..1..0..1..1..0..1 %e A301449 ..0..0..1..0..1..0..0. .0..0..1..0..0..1..0. .0..0..1..0..1..1..1 %e A301449 ..0..1..0..0..1..1..1. .0..1..0..1..1..0..1. .0..1..0..0..0..0..1 %e A301449 ..0..0..1..0..0..1..0. .0..0..1..1..0..0..0. .0..0..1..1..1..0..1 %Y A301449 Cf. A301450. %K A301449 nonn %O A301449 1,1 %A A301449 _R. H. Hardin_, Mar 21 2018