A265168 Number of n X 3 arrays containing 3 copies of 0..n-1 with no equal horizontal or vertical neighbors and new values introduced sequentially from 0.

0, 1, 6, 447, 40476, 5693966, 1109065142, 286017249449, 94359717938545, 38773039478955950

Offset

1,3

Comments

Column 3 of A265170.

Links

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

Example

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

Crossrefs

Cf. A265170.

Sequence in context: A270066 A001328 A174777 * A187514 A258873 A244195

Adjacent sequences: A265165 A265166 A265167 * A265169 A265170 A265171

Keyword

nonn

Author

R. H. Hardin, Dec 03 2015

Status

approved