A265239 Number of n X 4 arrays of permutations of 4 copies of 0..n-1 with no equal antidiagonal neighbors and new values introduced sequentially from 0.

1, 8, 888, 359172, 327847656, 559450092072, 1595319525849600, 7039355228926588752, 45427065106451676216288

Offset

1,2

Comments

Column 4 of A265241.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A265241.

Sequence in context: A262379 A175411 A027725 * A290023 A112578 A112579

Adjacent sequences: A265236 A265237 A265238 * A265240 A265241 A265242

Keyword

nonn

Author

R. H. Hardin, Dec 06 2015

Status

approved