A207062 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically

2, 16, 102, 720, 6398, 54684, 468348, 4356936, 41716708, 403445900, 4037337213, 41571957024, 435311467198, 4653843868560, 50835606848268, 564791240516000, 6378296516533122, 73247208566761530, 853936849893078000

Offset

1,1

Comments

Diagonal of A207068

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

Some solutions for n=4
..0..0..0..0....1..0..0..0....1..1..0..1....1..1..0..0....0..1..1..0
..1..1..0..1....1..1..0..0....0..0..0..0....1..0..0..0....0..1..1..1
..1..0..0..0....1..0..0..0....0..0..0..0....0..0..0..0....0..1..1..1
..0..0..0..0....1..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

Crossrefs

Sequence in context: A032260 A197800 A209645 * A207398 A207699 A207902

Adjacent sequences: A207059 A207060 A207061 * A207063 A207064 A207065

Keyword

nonn

Author

R. H. Hardin Feb 14 2012

Status

approved