A183509 Number of n X n binary arrays with each element equal to either the sum mod 2 of its horizontal and vertical neighbors or the sum mod 2 of its diagonal and antidiagonal neighbors.

1, 4, 37, 736, 24194, 2075747, 401449253, 174957270750

Offset

1,2

Comments

Diagonal of A183517.

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for 3 X 3
..1..0..0....1..0..0....1..0..1....1..0..0....0..1..0....0..0..0....1..1..1
..1..1..0....1..0..1....0..1..0....1..1..0....1..0..0....0..1..0....1..1..1
..1..0..0....0..0..1....1..0..0....1..1..1....0..0..0....0..0..1....1..0..1

Crossrefs

Cf. A183517.

Sequence in context: A061683 A084283 A163880 * A220245 A371441 A280219

Adjacent sequences: A183506 A183507 A183508 * A183510 A183511 A183512

Keyword

nonn

Author

R. H. Hardin Jan 05 2011

Status

approved