A215920 Number of diagonal and antidiagonal neighbor colorings of the odd squares of an n X n array with new integer colors introduced in row major order

1, 1, 4, 602, 322768, 33093356640, 12954733199158688, 2562708954818067388122544

Offset

1,3

Comments

Diagonal of A215924

Links

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

Example

Some solutions for n=4
..x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..0
..1..x..2..x....1..x..2..x....2..x..3..x....1..x..2..x....1..x..2..x
..x..0..x..0....x..3..x..1....x..0..x..0....x..0..x..1....x..0..x..0
..3..x..2..x....4..x..4..x....4..x..1..x....3..x..4..x....3..x..1..x

Crossrefs

Sequence in context: A123657 A195580 A069641 * A210853 A232620 A219892

Adjacent sequences: A215917 A215918 A215919 * A215921 A215922 A215923

Keyword

nonn

Author

R. H. Hardin Aug 27 2012

Status

approved