A265087 Number of nX3 arrays containing 3 copies of 0..n-1 with row sums equal and column sums equal.

1, 0, 12, 0, 1080, 0, 3135720, 0, 10831050720, 0

Offset

1,3

Comments

Column 3 of A265089.

Links

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

Example

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

Crossrefs

Cf. A265089.

Sequence in context: A012332 A012455 A120954 * A012337 A012339 A012448

Adjacent sequences: A265084 A265085 A265086 * A265088 A265089 A265090

Keyword

nonn

Author

R. H. Hardin, Dec 01 2015

Status

approved