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%I #6 Jan 02 2022 17:27:49
%S 8,21,61,212,658,2417,9037,33526,125626,477972,1824213,6971325,
%T 26702279,102479158,393541270,1511848952,5810405859,22336911663,
%U 85879249631,330208289450,1269748921864,4882763327280,18776842367003,72208138689837
%N Number of n X 5 0..1 arrays with every element equal to 0, 1 or 3 horizontally or vertically adjacent elements, with upper left element zero.
%C Column 5 of A301541.
%H R. H. Hardin, <a href="/A301538/b301538.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..1..0..1. .0..0..1..1..1. .0..1..1..1..0. .0..1..0..1..0
%e ..1..1..0..1..0. .1..1..0..1..0. .1..0..1..0..1. .1..0..1..0..1
%e ..0..0..1..0..1. .0..0..0..0..1. .0..1..0..1..1. .0..1..0..1..0
%e ..1..1..0..1..0. .1..0..1..1..0. .1..0..1..0..1. .0..0..1..0..1
%e ..0..0..1..0..1. .0..1..0..0..1. .0..1..0..0..0. .0..1..0..0..0
%Y Cf. A301541.
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 23 2018
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