A207934 Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 0 1 and 1 1 0 vertically

2, 16, 98, 643, 5594, 58602, 737575, 10609482, 171524786, 3063622641, 59875563176, 1270299719270, 29076260441101, 714274071132328, 18746674985446278, 523589036696879095, 15507197067809135806, 485494086155807224584

Offset

1,1

Comments

Diagonal of A207938

Links

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

Example

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

Crossrefs

Sequence in context: A207301 A207105 A207387 * A207780 A207461 A207515

Adjacent sequences: A207931 A207932 A207933 * A207935 A207936 A207937

Keyword

nonn

Author

R. H. Hardin Feb 21 2012

Status

approved