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Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.
1

%I #4 May 17 2018 09:54:53

%S 8,928,9573,124399,1894297,27769991,389403912,5581948043,80739890302,

%T 1161245568542,16657035643006,239529891739743,3446569197031058,

%U 49545001051376273,712194629192265637,10241055298106790590

%N Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

%C Column 7 of A304697.

%H R. H. Hardin, <a href="/A304696/b304696.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

%e ..0..1..1..1..0..0..0. .0..0..1..1..1..1..1. .0..1..0..1..1..0..0

%e ..0..0..1..0..0..0..1. .0..1..1..1..0..1..0. .0..0..0..0..1..0..1

%e ..0..0..0..0..0..0..0. .0..0..1..0..0..0..0. .0..0..0..0..0..0..0

%e ..0..1..1..0..0..1..1. .0..0..0..0..0..0..0. .0..1..0..1..0..0..0

%e ..0..1..1..0..0..0..1. .1..0..0..1..0..0..1. .1..0..1..0..1..1..1

%Y Cf. A304697.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 17 2018