A263782 Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and exactly two more elements moved upwards than downwards

0, 0, 0, 1, 2, 10, 31, 134, 439, 1604, 5088, 17115, 54199, 176073, 552856, 1755516, 5472509, 17149688, 53191180, 165306987, 510614655, 1578127066, 4859554763, 14963066678, 45966984378, 141165413462, 432876102395, 1326862831744

Offset

1,5

Comments

Column 3 of A263787

Links

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

Example

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

Crossrefs

Cf. A263787

Sequence in context: A197452 A050927 A197302 * A011921 A212714 A103290

Adjacent sequences: A263779 A263780 A263781 * A263783 A263784 A263785

Keyword

nonn

Author

R. H. Hardin, Oct 26 2015

Status

approved