A216088 Number of horizontal and antidiagonal neighbor colorings of the odd squares of a 6Xn array with new integer colors introduced in row major order.

5, 87, 4140, 433252, 99827160, 33093252880, 18383343930862, 12954733079950228, 13465808371086175084, 16679505315419165886800

Offset: 1

Author

R. H. Hardin Sep 01 2012

Keywords

• nonn

Comments

Row 6 of A216084

Examples

			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
..1..x..2..x....1..x..2..x....2..x..0..x....1..x..2..x....1..x..2..x
..x..0..x..3....x..3..x..4....x..1..x..0....x..3..x..4....x..3..x..0
..4..x..0..x....4..x..5..x....2..x..3..x....4..x..5..x....0..x..2..x
..x..2..x..4....x..4..x..6....x..4..x..5....x..3..x..0....x..0..x..2
..5..x..6..x....1..x..7..x....2..x..0..x....1..x..4..x....4..x..1..x