A265661 Number of nX3 arrays containing 3 copies of 0..n-1 with no element plus any horizontal or vertical neighbor equal to n-1.

0, 0, 4, 1608, 951040, 586218384, 1092575917680, 1790692038513408

Offset

1,3

Comments

Column 3 of A265663.

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Cf. A265663.

Sequence in context: A278549 A229664 A361449 * A280793 A160225 A316484

Adjacent sequences: A265658 A265659 A265660 * A265662 A265663 A265664

Keyword

nonn

Author

R. H. Hardin, Dec 12 2015

Status

approved