%I #4 Jan 07 2018 11:00:43
%S 0,25,222,1052,21519,284344,3740362,52727368,711614693,9830071754,
%T 134957151331,1851435077345,25452957854923,349571109226366,
%U 4802011704262362,65968126409569608,906203504992390038
%N Number of nX6 0..1 arrays with every element equal to 2, 3 or 4 king-move adjacent elements, with upper left element zero.
%C Column 6 of A297866.
%H R. H. Hardin, <a href="/A297864/b297864.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..0..0..0..0..0..0. .0..0..0..0..1..1. .0..0..0..1..0..0. .0..0..1..1..0..0
%e ..0..1..1..1..1..0. .0..1..1..1..0..1. .0..1..1..0..1..0. .0..1..0..1..0..0
%e ..0..1..0..0..1..0. .0..1..0..0..1..1. .1..0..0..1..0..1. .1..1..0..0..1..1
%e ..0..1..1..0..1..0. .0..1..0..1..0..0. .0..1..0..0..1..0. .1..0..1..0..1..0
%e ..0..0..0..1..0..0. .0..0..1..1..1..0. .0..0..1..1..0..0. .0..0..1..1..0..0
%Y Cf. A297866.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 07 2018