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Number of nX6 0..1 arrays with every element equal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.
1

%I #4 Jan 25 2018 08:48:44

%S 0,25,264,2246,34704,563977,8287084,125919136,1909040369,29074548954,

%T 442306308211,6726735527836,102369187396017,1557632901882843,

%U 23699769940163807,360615767570355940,5487096721395970064

%N Number of nX6 0..1 arrays with every element equal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

%C Column 6 of A298719.

%H R. H. Hardin, <a href="/A298717/b298717.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A298719.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 25 2018