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A207655
Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically
0
2, 16, 84, 870, 13902, 264568, 12327618, 1144562438, 64916691796, 20511370392174, 15431327748576322, 2046762983891357336, 5203964479172695849850, 32433326970178563780859912
OFFSET
1,1
COMMENTS
Diagonal of A207661
EXAMPLE
Some solutions for n=4
..0..1..0..1....0..1..0..1....0..1..1..0....1..0..1..1....1..0..0..1
..1..1..0..0....0..0..1..0....0..0..1..1....0..0..1..1....0..1..1..0
..1..0..0..1....0..1..0..1....0..1..1..0....1..0..1..0....1..0..1..1
..1..1..0..0....0..1..1..0....0..1..0..1....1..0..0..1....1..1..0..1
CROSSREFS
Sequence in context: A207340 A207768 A207891 * A071893 A220505 A370192
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 19 2012
STATUS
approved