A216342 Number of horizontal and antidiagonal neighbor colorings of the even squares of a 6Xn array with new integer colors introduced in row major order.

5, 114, 4140, 502658, 99827160, 37060650272, 18383343930862, 14216420433898186, 13465808371086175084, 18060513399132729563110

Offset: 1

Author

R. H. Hardin Sep 04 2012

Keywords

• nonn

Comments

Row 6 of A216338

Examples

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