A207248 Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 1 horizontally and 0 1 0 and 1 0 1 vertically

2, 16, 102, 940, 9072, 101036, 1231650, 16436824, 237255370, 3684061372, 61152471648, 1079792961548, 20191392448058, 398344602963240, 8263930584283206, 179759826117751524, 4089350929606635216

Offset

1,1

Comments

Diagonal of A207254

Links

R. H. Hardin, Table of n, a(n) for n = 1..70

Example

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

Crossrefs

Sequence in context: A207902 A267713 A207746 * A208033 A208159 A208282

Adjacent sequences: A207245 A207246 A207247 * A207249 A207250 A207251

Keyword

nonn

Author

R. H. Hardin Feb 16 2012

Status

approved