A267723 Number of nX6 arrays of permutations of 6 copies of 0..n-1 with every element equal to at least one horizontal neighbor and the top left element equal to 0.

1, 12, 588, 93672, 33807456, 22933860480, 26118842636160, 46232213032938240

Offset: 1

Author

R. H. Hardin, Jan 20 2016

Keywords

• nonn

Comments

Column 6 of A267724.

Examples

			Some solutions for n=4
..0..0..0..0..2..2....0..0..3..3..0..0....0..0..1..1..0..0....0..0..2..2..2..2
..3..3..1..1..1..1....1..1..3..3..2..2....2..2..2..2..3..3....3..3..1..1..1..1
..2..2..0..0..3..3....2..2..2..2..3..3....3..3..1..1..1..1....0..0..1..1..0..0
..2..2..3..3..1..1....1..1..1..1..0..0....0..0..3..3..2..2....3..3..3..3..2..2
		

Crossrefs

Cf. A267724.