A207387 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 1 0 vertically

2, 16, 98, 643, 5348, 42167, 335915, 2975974, 27237128, 254712604, 2518233755, 25906520150, 274611244775, 3028044205471, 34585700854386

Offset

1,1

Comments

Diagonal of A207391

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Sequence in context: A082639 A207301 A207105 * A207934 A207780 A207461

Adjacent sequences: A207384 A207385 A207386 * A207388 A207389 A207390

Keyword

nonn

Author

R. H. Hardin Feb 17 2012

Status

approved