A265678 Number of nX3 arrays containing 3 copies of 0..n-1 with no equal vertical or antidiagonal neighbors and new values introduced sequentially from 0.

1, 1, 17, 632, 54920, 7286105, 1365147580, 342267410418, 110526428031479, 44658757291775157

Offset

1,3

Comments

Column 3 of A265679.

Links

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

Example

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

Crossrefs

Cf. A265679.

Sequence in context: A012219 A349783 A219075 * A200907 A203170 A350981

Adjacent sequences: A265675 A265676 A265677 * A265679 A265680 A265681

Keyword

nonn

Author

R. H. Hardin, Dec 13 2015

Status

approved