A265862 Number of n X 4 arrays of permutations of 4 copies of 0..n-1 with no element plus any vertical neighbor equal to n-1.

1, 6, 1462, 1584088, 8616332520, 71643177829872, 1642669067898696816

Offset

1,2

Comments

Column 4 of A265863.

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Cf. A265863.

Sequence in context: A107252 A358626 A131453 * A281255 A216934 A308029

Adjacent sequences: A265859 A265860 A265861 * A265863 A265864 A265865

Keyword

nonn

Author

R. H. Hardin, Dec 17 2015

Status

approved