A216024 Number of horizontal, vertical and diagonal neighbor colorings of the odd squares of an n X n array with new integer colors introduced in row major order.

1, 2, 4, 371, 146327, 10311562327

Offset

1,2

Comments

Diagonal of A216031.

Links

Table of n, a(n) for n=1..6.

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..1
..2..x..3..x....0..x..2..x....2..x..3..x....2..x..3..x....2..x..3..x
..x..3..x..4....x..1..x..0....x..3..x..0....x..4..x..2....x..1..x..4
..3..x..0..x....3..x..0..x....4..x..2..x....5..x..2..x....1..x..0..x

Crossrefs

Cf. A216031.

Sequence in context: A012557 A012562 A263959 * A247220 A012753 A012440

Adjacent sequences: A216021 A216022 A216023 * A216025 A216026 A216027

Keyword

nonn

Author

R. H. Hardin, Aug 30 2012

Status

approved