A265855 Number of nX3 arrays containing 3 copies of 0..n-1 with no element plus any horizontal or antidiagonal neighbor equal to n-1.

0, 0, 30, 3344, 2450392, 1627602144, 2887429166352, 4949478766305024

Offset

1,3

Comments

Column 3 of A265856.

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Cf. A265856.

Sequence in context: A001459 A303007 A209788 * A289395 A338962 A115465

Adjacent sequences: A265852 A265853 A265854 * A265856 A265857 A265858

Keyword

nonn

Author

R. H. Hardin, Dec 16 2015

Status

approved