A263642 Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 places and with no two consecutive increases.

1, 2, 5, 17, 70, 349, 2017, 13358, 74678, 335720, 1500041, 6440272, 28038374, 123298684, 556103807, 2564034001, 11893926843, 55032401086, 253092976011, 1160780168755, 5299878003384, 24174899648334, 110233336977738

Offset

1,2

Comments

Column 7 of A263643.

Links

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

Example

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

Crossrefs

Cf. A263643.

Sequence in context: A263680 A263641 A263681 * A263682 A049774 A317132

Adjacent sequences: A263639 A263640 A263641 * A263643 A263644 A263645

Keyword

nonn

Author

R. H. Hardin, Oct 22 2015

Status

approved