A265880 Number of nX3 arrays containing 3 copies of 0..n-1 with no element plus any horizontal neighbor equal to n-1.

0, 2, 152, 30488, 18437120, 13734486480, 21429982230720, 40229528835726720, 131323790370474455040

Offset

1,2

Comments

Column 3 of A265882.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A265882.

Sequence in context: A113576 A102458 A206309 * A064436 A012605 A012602

Adjacent sequences: A265877 A265878 A265879 * A265881 A265882 A265883

Keyword

nonn

Author

R. H. Hardin, Dec 17 2015

Status

approved