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A207595
Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically
1
2, 16, 90, 441, 3915, 42025, 292600, 1982464, 21925800, 268730449, 2281109103, 19215781641, 242188032450, 3266593546384, 32361595709850, 320442399819025, 4434278073813775, 64468102969055809, 723471023371037040
OFFSET
1,1
COMMENTS
Diagonal of A207599
LINKS
EXAMPLE
Some solutions for n=4
..1..1..1..1....1..0..0..1....1..1..0..1....1..0..0..1....1..0..1..1
..1..1..1..0....0..1..1..0....1..0..1..1....1..0..1..1....0..0..1..1
..1..1..1..0....0..1..1..0....0..0..1..1....0..0..1..1....0..0..1..1
..1..1..0..0....0..1..1..0....0..0..1..1....0..0..1..1....0..0..1..1
CROSSREFS
Sequence in context: A069440 A000431 A281982 * A253487 A207019 A207164
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 19 2012
STATUS
approved