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A183343 Number of n X n binary arrays with each 1 adjacent to exactly one 0 vertically and one 0 horizontally 1

%I

%S 1,7,16,63,594,6388,88177,2078075,67448514,3011210310,200949643314,

%T 19152543505058,2587734793386622,506430044756068101,

%U 142259297693953559997,57178237320333047697665

%N Number of n X n binary arrays with each 1 adjacent to exactly one 0 vertically and one 0 horizontally

%C Diagonal of A183352

%H R. H. Hardin, <a href="/A183343/b183343.txt">Table of n, a(n) for n = 1..20</a>

%e Some solutions for 5X5

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 04 2011

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Last modified September 23 22:32 EDT 2020. Contains 337315 sequences. (Running on oeis4.)