A216614 Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of a 5Xn array with new integer colors introduced in row major order

2, 15, 67, 4140, 83437, 18171918, 732209051, 346212390266, 22294303538804, 18633407258171930, 1714659308610029464

Offset

1,1

Comments

Row 5 of A216612

Links

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

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

Crossrefs

Sequence in context: A176972 A117393 A055206 * A146757 A091135 A056037

Adjacent sequences: A216611 A216612 A216613 * A216615 A216616 A216617

Keyword

nonn

Author

R. H. Hardin Sep 10 2012

Status

approved