A263759 Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and exactly one more element moved upwards than downwards

0, 0, 1, 4, 19, 50, 165, 476, 1543, 4544, 14108, 41666, 127313, 379674, 1152233, 3448844, 10424890, 31290646, 94453041, 284071264, 857114281, 2581411140, 7789677889, 23486717204, 70901078303, 213968862304, 646246694302

Offset

1,4

Comments

Column 3 of A263764

Links

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

Example

Some solutions for n=7
..2....2....2....3....3....3....3....0....3....2....0....2....0....1....3....0
..0....0....1....0....0....2....4....2....2....0....3....1....1....0....4....3
..1....3....5....4....2....0....0....5....0....5....2....0....5....2....0....5
..5....1....0....6....1....6....6....1....1....1....1....3....3....3....1....1
..3....6....3....1....4....1....1....3....6....4....6....6....2....6....2....2
..6....4....4....2....5....4....2....4....4....3....4....4....4....4....6....4
..4....5....6....5....6....5....5....6....5....6....5....5....6....5....5....6

Crossrefs

Cf. A263764

Sequence in context: A024013 A067981 A174458 * A162254 A138617 A304993

Adjacent sequences: A263756 A263757 A263758 * A263760 A263761 A263762

Keyword

nonn

Author

R. H. Hardin, Oct 25 2015

Status

approved