A207435 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 0 vertically

2, 16, 108, 1360, 41092, 2405923, 284247216, 68394049216, 33064776069834, 31868588102983450, 61446275576502856313, 236673591523285699197386, 1818567731722871472685169098, 27879399799936252965503867197417

Offset

1,1

Comments

Diagonal of A207442

Links

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

Example

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

Crossrefs

Sequence in context: A193217 A329550 A208137 * A301940 A359758 A370245

Adjacent sequences: A207432 A207433 A207434 * A207436 A207437 A207438

Keyword

nonn

Author

R. H. Hardin Feb 17 2012

Status

approved