A263641 Number of length n arrays of permutations of 0..n-1 with each element moved by -6 to 6 places and with no two consecutive increases.

1, 2, 5, 17, 70, 349, 2017, 9673, 36321, 138420, 511748, 1952716, 7596839, 30518737, 122761971, 492354214, 1954807815, 7749597167, 30587342598, 120939248751, 478688493595, 1897205025687, 7520593309740, 29825363773570, 118218233684104

Offset

1,2

Comments

Column 6 of A263643.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=6
..5....5....5....0....2....4....3....5....1....4....2....1....1....4....2....5
..2....4....3....5....4....5....4....1....5....3....5....5....5....0....3....0
..3....2....0....2....0....1....0....4....4....1....4....0....3....5....1....3
..1....0....2....4....3....3....2....2....3....2....3....4....4....1....4....1
..4....3....1....1....1....0....1....3....0....0....0....3....2....3....0....4
..0....1....4....3....5....2....5....0....2....5....1....2....0....2....5....2

Crossrefs

Cf. A263643.

Sequence in context: A251177 A263640 A263680 * A263681 A263642 A263682

Adjacent sequences: A263638 A263639 A263640 * A263642 A263643 A263644

Keyword

nonn

Author

R. H. Hardin, Oct 22 2015

Status

approved