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Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1s.
1

%I #4 Nov 16 2017 21:59:04

%S 1,13,111,777,5831,40924,279663,1900344,12981261,89115875,612783404,

%T 4213804514,28966104726,199059108169,1367802766449,9398558906151,

%U 64581809194142,443780394667276,3049505888159977,20955159932737734

%N Number of nX7 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1s.

%C Column 7 of A295205.

%H R. H. Hardin, <a href="/A295204/b295204.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=6

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

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

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

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

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

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

%Y Cf. A295205.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 16 2017