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 A301795 #6 Jun 07 2021 13:24:11 %S A301795 32,233,96,116,150,205,294,438,671,1048,1658,2645,4242,6826,11007, %T A301795 17772,28718,46429,75086,121454,196479,317872,514290,832101,1346330, %U A301795 2178370,3524639,5702948,9227526,14930413,24157878,39088230,63246047,102334216 %N A301795 Number of 6 X n 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero. %C A301795 Row 6 of A301790. %H A301795 R. H. Hardin, <a href="/A301795/b301795.txt">Table of n, a(n) for n = 1..210</a> %F A301795 Empirical: a(n) = 2*a(n-1) -a(n-3) for n > 6. %e A301795 Some solutions for n=5 %e A301795 ..0..1..0..0..1. .0..1..0..1..1. .0..1..0..1..0. .0..0..1..0..1 %e A301795 ..0..1..1..0..0. .0..1..0..0..1. .1..0..1..0..1. .1..0..1..0..1 %e A301795 ..0..0..1..1..0. .0..1..1..0..1. .1..0..1..0..0. .1..0..1..0..0 %e A301795 ..1..0..0..1..0. .0..0..1..0..0. .1..0..1..1..0. .1..0..1..1..0 %e A301795 ..1..1..0..1..0. .1..0..1..1..0. .1..0..0..1..0. .1..0..0..1..0 %e A301795 ..0..1..0..1..1. .1..0..0..1..1. .1..1..0..1..0. .1..1..0..1..1 %Y A301795 Cf. A301790. %K A301795 nonn %O A301795 1,1 %A A301795 _R. H. Hardin_, Mar 26 2018