A207494 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically

2, 16, 102, 1004, 14253, 237576, 5715255, 163471950, 6200122170, 294261603282, 17977383927693, 1375335087129521, 138833395825965196, 17233401412131428885, 2924391663494366576782, 600552802391087361313757

Offset

1,1

Comments

Diagonal of A207500

Links

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

Example

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

Crossrefs

Sequence in context: A208282 A207236 A207955 * A207117 A208415 A207945

Adjacent sequences: A207491 A207492 A207493 * A207495 A207496 A207497

Keyword

nonn

Author

R. H. Hardin Feb 18 2012

Status

approved