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%I #4 Mar 27 2018 10:17:00
%S 0,89,32,457,4785,31061,333335,2626219,23877827,205351902,1801313687,
%T 15687547616,136936362641,1194708417693,10425856252982,90962890652095,
%U 793785856101375,6926025279583683,60436457205654289,527344354745821834
%N Number of 6Xn 0..1 arrays with every element equal to 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.
%C Row 6 of A301823.
%H R. H. Hardin, <a href="/A301827/b301827.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..1..0..0. .0..0..1..1..1. .0..0..1..1..1. .0..0..1..1..1
%e ..0..1..1..0..0. .0..0..0..0..0. .0..1..0..1..0. .0..1..0..1..1
%e ..0..0..1..1..0. .1..1..1..1..1. .1..0..1..0..0. .1..0..0..1..1
%e ..0..1..1..0..1. .0..0..0..0..0. .0..0..1..1..1. .1..1..0..0..1
%e ..0..0..0..1..0. .1..1..1..0..0. .0..0..0..0..0. .1..1..0..1..1
%e ..1..1..1..0..0. .0..0..1..1..1. .1..1..1..1..1. .1..1..0..0..0
%Y Cf. A301823.
%K nonn
%O 1,2
%A _R. H. Hardin_, Mar 27 2018