

A183343


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


1



1, 7, 16, 63, 594, 6388, 88177, 2078075, 67448514, 3011210310, 200949643314, 19152543505058, 2587734793386622, 506430044756068101, 142259297693953559997, 57178237320333047697665
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OFFSET

1,2


COMMENTS



LINKS



EXAMPLE

Some solutions for 5 X 5
..0..0..0..0..1....1..0..0..0..0....1..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..1..1..0..0....0..1..1..0..1....0..0..0..0..1
..0..0..0..0..0....0..1..1..0..0....0..1..1..0..1....1..0..0..0..1
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....1..0..0..0..0
..1..0..1..1..0....0..1..1..0..0....1..0..0..0..0....0..1..1..0..1


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



