A207955 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 0 vertically

2, 16, 102, 989, 15839, 454223, 22743106, 1965912435, 292568573966, 74527048580258, 32449227184884623, 24089588153258657647, 30462508808101945246072, 65556106479277551484530086

Offset

1,1

Comments

Diagonal of A207960

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A208159 A208282 A207236 * A207494 A207117 A208415

Adjacent sequences: A207952 A207953 A207954 * A207956 A207957 A207958

Keyword

nonn

Author

R. H. Hardin Feb 21 2012

Status

approved