A265191 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal horizontal or antidiagonal neighbors and new values introduced sequentially from 0.

0, 1, 42, 20592, 20957398, 38833756515, 117650546564305, 543403955513408885

Offset

1,3

Comments

Column 4 of A265192.

Links

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

Example

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

Crossrefs

Cf. A265192.

Sequence in context: A227493 A095423 A174766 * A184895 A263058 A299503

Adjacent sequences: A265188 A265189 A265190 * A265192 A265193 A265194

Keyword

nonn

Author

R. H. Hardin, Dec 04 2015

Status

approved