A190834 Number of permutations of 5 copies of 1..n introduced in order 1..n with no element equal to another within a distance of 2

0, 0, 1, 15743, 312841383, 10691055854826, 628262652845622327

Offset

1,4

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A205289 A205897 A350884 * A183966 A187031 A233642

Adjacent sequences: A190831 A190832 A190833 * A190835 A190836 A190837

Keyword

nonn

Author

R. H. Hardin May 21 2011

Status

approved