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%I #4 Mar 24 2018 11:40:34
%S 3,111,2131,40085,758338,14345706,271301458,5131197358,97045266159,
%T 1835413254015,34712996298775,656524254453280,12416789603607923,
%U 234837748693978527,4441467446525879000,84001117092821240904
%N Number of nX5 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
%C Column 5 of A301615.
%H R. H. Hardin, <a href="/A301612/b301612.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A301612/a301612.txt">Empirical recurrence of order 68</a>
%F Empirical recurrence of order 68 (see link above)
%e Some solutions for n=5
%e ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
%e ..1..1..1..0..0. .0..0..1..0..1. .1..0..1..1..0. .1..1..1..1..0
%e ..1..1..1..1..0. .1..0..1..0..1. .1..1..1..0..1. .1..1..0..0..0
%e ..0..0..0..1..1. .1..0..1..1..1. .1..1..0..0..1. .0..1..1..0..0
%e ..1..1..1..1..1. .1..0..1..1..1. .1..1..0..0..1. .0..1..1..1..1
%Y Cf. A301615.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 24 2018
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