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 A301788 #4 Mar 26 2018 16:40:24 %S A301788 13,22,38,66,116,205,364,648,1156,2065,3692,6605,11821,21162,37891, %T A301788 67853,121517,217635,389795,698159,1250488,2239801,4011830,7185843, %U A301788 12871061,23054299,41294302,73965426,132485296,237304945,425055875,761351738 %N A301788 Number of nX6 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero. %C A301788 Column 6 of A301790. %H A301788 R. H. Hardin, <a href="/A301788/b301788.txt">Table of n, a(n) for n = 1..210</a> %F A301788 Empirical: a(n) = a(n-1) +2*a(n-2) -a(n-4) -a(n-5) -a(n-6) %e A301788 Some solutions for n=5 %e A301788 ..0..1..1..0..1..0. .0..0..1..0..0..1. .0..1..0..1..0..1. .0..1..0..1..0..0 %e A301788 ..0..0..1..0..1..0. .1..0..1..1..0..1. .1..0..1..0..1..0. .0..1..0..1..1..0 %e A301788 ..1..0..1..0..1..0. .1..0..0..1..0..1. .1..0..1..0..1..1. .0..1..0..0..1..0 %e A301788 ..1..0..1..0..1..0. .1..1..0..1..0..0. .1..0..1..0..0..1. .0..1..1..0..1..1 %e A301788 ..0..1..0..1..0..1. .0..1..0..1..1..0. .1..0..1..1..0..0. .0..0..1..0..0..1 %Y A301788 Cf. A301790. %K A301788 nonn %O A301788 1,1 %A A301788 _R. H. Hardin_, Mar 26 2018