A207780 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 0 1 vertically

2, 16, 98, 791, 6766, 65094, 786907, 9855231, 142116676, 2459545057, 46309750425, 999589825419, 26202502382134, 768926273969151, 25878896800392858, 1098191860946291476, 52205734467966457603, 2867736141204451650414

Offset

1,1

Comments

Diagonal of A207785

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Sequence in context: A207105 A207387 A207934 * A207461 A207515 A207913

Adjacent sequences: A207777 A207778 A207779 * A207781 A207782 A207783

Keyword

nonn

Author

R. H. Hardin Feb 20 2012

Status

approved