A216463 Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of a 5Xn array with new integer colors introduced in row major order

5, 15, 322, 4140, 580479, 18171918, 6423148007, 346212390266, 232431640956990, 18633407258171930, 20538497277155387947

Offset

1,1

Comments

Row 5 of A216460

Links

Table of n, a(n) for n=1..11.

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..3....x..2..x..3....x..2..x..3....x..2..x..3
..3..x..4..x....0..x..1..x....4..x..1..x....4..x..5..x....1..x..0..x
..x..5..x..3....x..3..x..0....x..0..x..4....x..1..x..4....x..2..x..4
..3..x..6..x....4..x..5..x....2..x..3..x....3..x..5..x....4..x..0..x

Crossrefs

Sequence in context: A134715 A053918 A053926 * A213147 A112273 A298510

Adjacent sequences: A216460 A216461 A216462 * A216464 A216465 A216466

Keyword

nonn

Author

R. H. Hardin Sep 07 2012

Status

approved