A216613 Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of a 3 X n array with new integer colors introduced in row major order.

1, 2, 2, 15, 41, 716, 2847, 83440, 426422, 18171918, 112072316, 6423127757, 46054057965, 3376465219485, 27457462735926, 2486327138729353, 22530435476364494, 2454996141671330713, 24463971326544703312

Offset: 1

Author

R. H. Hardin, Sep 10 2012

Keywords

• nonn

Comments

Row 3 of A216612.

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..41

Crossrefs

Cf. A216612.