A207461 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 0 and 1 0 1 vertically

2, 16, 98, 1307, 21517, 491948, 16675001, 760840082, 48694010408, 4485988205726, 562936265068141, 102307352557957161, 26014225086453944774, 9391676528481972080755, 4844995109176631213739332

Offset

1,1

Comments

Diagonal of A207467

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Sequence in context: A207387 A207934 A207780 * A207515 A207913 A208694

Adjacent sequences: A207458 A207459 A207460 * A207462 A207463 A207464

Keyword

nonn

Author

R. H. Hardin Feb 18 2012

Status

approved