A207945 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 1 0 and 1 0 1 vertically

2, 16, 102, 1369, 18172, 362404, 7513176, 208947025, 6018764552, 220642515076, 8323556149400, 385679126851225, 18298351908731960, 1039016878950507076, 60196918693633189580, 4091835726607570472281, 283040172741877232421150

Offset

1,1

Comments

Diagonal of A207949

Links

R. H. Hardin, Table of n, a(n) for n = 1..50

Example

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

Crossrefs

Sequence in context: A207494 A207117 A208415 * A207853 A208022 A207803

Adjacent sequences: A207942 A207943 A207944 * A207946 A207947 A207948

Keyword

nonn

Author

R. H. Hardin Feb 21 2012

Status

approved