The On-Line Encyclopedia of Integer Sequences (OEIS)

A263681 revision #3

A263681

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 decreases.

1, 2, 5, 17, 70, 349, 2017, 11253, 58743, 286327, 1331630, 6077344, 27523597, 126333667, 587717372, 2760990038, 13033515692, 61583867944, 290639649211, 1368090247852, 6426462715392, 30151737816899, 141417395713905

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OFFSET

1,2

COMMENTS

Column 6 of A263683.

LINKS

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

EXAMPLE

Some solutions for n=7

..1....4....1....3....3....2....1....2....0....0....5....0....0....3....2....2

..0....5....6....6....5....6....0....5....5....2....6....1....1....1....6....0

..5....0....4....0....6....1....3....0....1....5....1....3....6....5....3....1

..6....1....5....2....0....4....2....1....4....6....3....4....4....0....5....6

..2....6....2....4....1....3....4....3....6....3....0....6....5....6....1....3

..3....2....3....1....2....5....5....4....2....4....2....2....2....2....4....4

..4....3....0....5....4....0....6....6....3....1....4....5....3....4....0....5

CROSSREFS

Cf. A263683.

Sequence in context: A263640 A263680 A263641 * A263642 A263682 A049774

Adjacent sequences: A263678 A263679 A263680 * A263682 A263683 A263684

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 23 2015

STATUS

editing