A265371 Number of nX3 arrays containing 3 copies of 0..n-1 with no equal horizontal, vertical or antidiagonal neighbors and new values introduced sequentially from 0.

0, 0, 1, 32, 4954, 878953, 192333677, 53404173562, 18545695848787, 7914432322153846

Offset

1,4

Comments

Column 3 of A265373.

Links

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

Example

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

Crossrefs

Cf. A265373.

Sequence in context: A248000 A278302 A071310 * A232913 A209542 A028461

Adjacent sequences: A265368 A265369 A265370 * A265372 A265373 A265374

Keyword

nonn

Author

R. H. Hardin, Dec 07 2015

Status

approved