A263743 Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 places and equal numbers of elements moved upwards and downwards.

1, 2, 4, 14, 46, 282, 1394, 12658, 68834, 535262, 2657220, 17475120, 85950104, 527877048, 2718408447, 16862137915, 91926451748, 573370470804, 3205404296496, 19797261171758, 111841627799232, 680889785121642, 3871436713513634

Offset

1,2

Links

R. H. Hardin, Table of n, a(n) for n = 1..45

Example

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

Crossrefs

Column 7 of A263744.

Sequence in context: A327034 A263741 A263742 * A062868 A054936 A006443

Adjacent sequences: A263740 A263741 A263742 * A263744 A263745 A263746

Keyword

nonn

Author

R. H. Hardin, Oct 25 2015

Status

approved