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A207699
Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 0 vertically
1
2, 16, 102, 729, 8151, 105625, 1369900, 19891600, 334808748, 6181890625, 122401625127, 2624869821025, 60940432893132, 1515981414587236, 40169735443014974, 1131549414709903225, 33790458968920700067
OFFSET
1,1
COMMENTS
Diagonal of A207703
LINKS
EXAMPLE
Some solutions for n=4
..0..1..1..1....1..0..0..1....1..1..1..1....0..0..1..1....1..0..1..1
..0..0..1..1....1..0..0..1....1..1..0..0....1..0..1..1....1..1..0..0
..0..1..1..1....1..0..0..1....1..1..1..1....0..0..1..1....1..1..1..0
..0..1..1..1....1..0..0..1....1..1..0..0....0..0..1..1....1..1..1..0
CROSSREFS
Sequence in context: A209645 A207062 A207398 * A207902 A267713 A207746
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 19 2012
STATUS
approved