A265372 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal horizontal, vertical or antidiagonal neighbors and new values introduced sequentially from 0.

0, 0, 1, 236, 363850, 860077644, 3040856393843, 15614173687644042

Offset: 1

Author

R. H. Hardin, Dec 07 2015

Keywords

• nonn

Comments

Column 4 of A265373.

Examples

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

Crossrefs

Cf. A265373.