A207902 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 0 1 1 vertically

2, 16, 102, 841, 13865, 314721, 6835345, 167806116, 7410251162, 472676875225, 25730176554865, 1604226387312025, 207661113723753822, 40075955918500009225, 5496265530262722657980, 835639569395431034391481

Offset

1,1

Comments

Diagonal of A207908

Links

Table of n, a(n) for n=1..16.

Example

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

Crossrefs

Sequence in context: A207062 A207398 A207699 * A267713 A207746 A207248

Adjacent sequences: A207899 A207900 A207901 * A207903 A207904 A207905

Keyword

nonn

Author

R. H. Hardin Feb 21 2012

Status

approved