A216464 Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of a 6Xn array with new integer colors introduced in row major order

5, 52, 1335, 115975, 20880505, 6423127757, 3030359756694, 2043836470040286

Offset

1,1

Comments

Row 6 of A216460

Links

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

Example

Some solutions for n=4
..0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x
..x..2..x..3....x..2..x..0....x..2..x..3....x..2..x..3....x..2..x..3
..3..x..4..x....3..x..4..x....4..x..0..x....1..x..4..x....4..x..1..x
..x..2..x..3....x..2..x..1....x..5..x..4....x..2..x..0....x..5..x..0
..1..x..0..x....5..x..6..x....1..x..3..x....3..x..1..x....6..x..7..x
..x..2..x..1....x..1..x..3....x..4..x..5....x..2..x..0....x..4..x..2

Crossrefs

Sequence in context: A303000 A278879 A322195 * A279644 A001173 A277202

Adjacent sequences: A216461 A216462 A216463 * A216465 A216466 A216467

Keyword

nonn

Author

R. H. Hardin Sep 07 2012

Status

approved