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 A301448 #4 Mar 21 2018 11:55:06 %S A301448 32,1490,34976,877044,22207589,564002959,14319674594,363595763125, %T A301448 9231743942243,234399915906671,5951543846998622,151113108480960499, %U A301448 3836847205649231379,97419726227858989197,2473542056644931255534 %N A301448 Number of nX6 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 A301448 Column 6 of A301450. %H A301448 R. H. Hardin, <a href="/A301448/b301448.txt">Table of n, a(n) for n = 1..210</a> %e A301448 Some solutions for n=5 %e A301448 ..0..0..0..0..1..0. .0..0..0..0..1..1. .0..0..0..0..0..0. .0..0..0..0..1..0 %e A301448 ..0..1..1..0..1..0. .0..1..1..0..0..0. .0..1..1..1..1..1. .0..1..1..1..0..1 %e A301448 ..0..0..1..0..1..1. .0..0..1..1..1..0. .0..0..0..0..0..1. .0..0..1..0..1..0 %e A301448 ..0..1..1..0..0..0. .0..1..0..0..1..0. .0..1..0..1..0..1. .0..1..0..0..0..1 %e A301448 ..0..0..1..1..1..0. .0..0..1..0..0..0. .0..0..1..0..0..0. .0..0..1..1..1..1 %Y A301448 Cf. A301450. %K A301448 nonn %O A301448 1,1 %A A301448 _R. H. Hardin_, Mar 21 2018