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Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 3 1s.
1

%I #4 Nov 14 2017 11:16:20

%S 9,123,1249,14187,158361,1767431,19730839,220211372,2459567704,

%T 27461372975,306610224608,3423494664478,38224982366034,

%U 426799899112382,4765433609340078,53208437047534044,594098283361810851

%N Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 1 or 3 1s.

%C Column 6 of A295097.

%H R. H. Hardin, <a href="/A295095/b295095.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A295097.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 14 2017