A265420 Number of n X 3 arrays containing 3 copies of 0..n-1 with no equal horizontal, vertical, diagonal or antidiagonal neighbors and new values introduced sequentially from 0.

0, 0, 0, 1, 225, 86226, 25009492, 8099337021, 3096486423133, 1412534036530778

Offset

1,5

Comments

Column 3 of A265421.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=6
..0..1..2....0..1..0....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2
..3..4..0....2..3..4....2..3..4....3..4..3....2..3..4....3..4..3....3..4..3
..5..1..3....5..1..2....1..0..5....5..2..5....0..1..0....2..1..2....2..5..0
..4..2..5....3..4..3....4..3..1....1..0..4....5..4..5....4..3..5....4..3..1
..5..3..1....5..2..5....5..2..5....4..2..1....3..2..3....5..1..0....5..0..5
..0..4..2....0..4..1....3..0..4....3..0..5....5..1..4....0..4..5....4..2..1

Crossrefs

Cf. A265421.

Sequence in context: A036428 A183822 A260864 * A171109 A239478 A304314

Adjacent sequences: A265417 A265418 A265419 * A265421 A265422 A265423

Keyword

nonn

Author

R. H. Hardin, Dec 08 2015

Status

approved