A263740 Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and equal numbers of elements moved upwards and downwards

1, 2, 4, 14, 46, 214, 664, 2516, 7989, 30299, 104622, 399316, 1411880, 5298114, 18971986, 70774024, 256952680, 957861715, 3507882839, 13059944402, 48088198908, 178984147550, 661805950128, 2464463156096, 9141021963396

Offset

1,2

Comments

Column 4 of A263744

Links

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

Example

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

Crossrefs

Cf. A263744

Sequence in context: A255502 A149851 A149852 * A005437 A214267 A266695

Adjacent sequences: A263737 A263738 A263739 * A263741 A263742 A263743

Keyword

nonn

Author

R. H. Hardin, Oct 25 2015

Status

approved