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A207768
Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 0 vertically
1
2, 16, 84, 828, 11950, 195160, 6513576, 364308938, 15284596082, 2700018736020, 787454317079753, 72216754252055376, 73270546375550142283, 119728540088330705652453, 22114539991379386419299095
OFFSET
1,1
COMMENTS
Diagonal of A207774
LINKS
EXAMPLE
Some solutions for n=4
..1..1..0..0....1..1..0..1....0..1..1..0....1..0..0..1....1..1..0..0
..0..1..0..1....1..1..0..1....1..1..0..0....1..0..1..1....1..0..1..0
..1..1..0..1....1..1..0..1....1..0..1..0....0..0..1..1....1..0..1..0
..1..1..0..0....0..1..0..1....0..1..1..0....0..0..1..0....1..0..1..0
CROSSREFS
Sequence in context: A207757 A283951 A207340 * A207891 A207655 A071893
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 20 2012
STATUS
approved