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%I #4 Mar 27 2018 10:11:39
%S 3,18,74,299,1197,4785,19130,76499,305959,1223777,4895020,19579955,
%T 78319649,313278369,1253113182,5012452355,20049808955,80199235249,
%U 320796940304,1283187760387,5132751040565,20531004161105,82124016643074
%N Number of nX5 0..1 arrays with every element equal to 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.
%C Column 5 of A301823.
%H R. H. Hardin, <a href="/A301820/b301820.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 8*a(n-1) -22*a(n-2) +28*a(n-3) -17*a(n-4) +4*a(n-5) for n>7
%e Some solutions for n=5
%e ..0..0..0..0..1. .0..0..0..1..0. .0..0..1..1..1. .0..0..1..1..1
%e ..1..1..0..1..1. .1..1..1..0..1. .0..0..0..0..0. .0..0..0..1..0
%e ..1..1..0..1..0. .0..0..0..1..1. .1..1..1..1..0. .1..1..1..0..0
%e ..1..0..1..0..0. .1..1..0..1..1. .0..0..1..0..1. .0..0..1..1..0
%e ..0..1..1..1..1. .1..0..0..1..1. .1..1..0..1..1. .0..0..1..0..0
%Y Cf. A301823.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 27 2018
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