A216336 Number of horizontal and antidiagonal neighbor colorings of the even squares of an nX6 array with new integer colors introduced in row major order.

2, 42, 2440, 373780, 87852160, 37060650272, 20358402201792, 17131843186425504, 17423570614012565376, 24860319276726031245440, 41082882676098706722895360, 90015726535715347904300537088, 222247072052822589353800809064448

Offset: 1

Author

R. H. Hardin Sep 04 2012

Keywords

• nonn

Comments

Column 6 of A216338

Examples

			Some solutions for n=4
..0..x..1..x..0..x....0..x..1..x..0..x....0..x..1..x..2..x....0..x..1..x..0..x
..x..2..x..3..x..1....x..2..x..3..x..4....x..0..x..3..x..4....x..2..x..3..x..2
..1..x..0..x..2..x....1..x..5..x..0..x....4..x..5..x..1..x....1..x..4..x..0..x
..x..3..x..4..x..3....x..4..x..5..x..2....x..6..x..3..x..2....x..0..x..2..x..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..26