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 A301794 #4 Mar 26 2018 16:44:53 %S A301794 16,89,48,61,82,116,171,260,404,637,1014,1624,2611,4208,6792,10973, %T A301794 17738,28684,46395,75052,121420,196445,317838,514256,832067,1346296, %U A301794 2178336,3524605,5702914,9227492,14930379,24157844,39088196,63246013,102334182 %N A301794 Number of 5Xn 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero. %C A301794 Row 5 of A301790. %H A301794 R. H. Hardin, <a href="/A301794/b301794.txt">Table of n, a(n) for n = 1..210</a> %F A301794 Empirical: a(n) = 2*a(n-1) -a(n-3) for n>5 %e A301794 Some solutions for n=5 %e A301794 ..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..0..1..1..0 %e A301794 ..1..0..1..0..1. .0..1..0..1..1. .0..1..0..1..0. .1..0..0..1..0 %e A301794 ..1..0..1..0..0. .0..1..0..0..1. .1..0..1..0..1. .1..1..0..1..0 %e A301794 ..1..0..1..1..0. .0..1..1..0..1. .1..0..1..0..0. .0..1..0..1..0 %e A301794 ..1..0..0..1..1. .0..0..1..0..0. .1..0..1..1..0. .0..1..0..1..0 %Y A301794 Cf. A301790. %K A301794 nonn %O A301794 1,1 %A A301794 _R. H. Hardin_, Mar 26 2018