A152636 Number of permutations of floor(i*7/3), i=0..n-1, with all sums of 7 adjacent terms unique.

1, 2, 6, 24, 120, 720, 5040, 40320, 341760, 3212640, 32435424, 359770272, 4362965120, 55955291968, 778123945616, 11693170893860

Offset

1,2

Links

Table of n, a(n) for n=1..16.

Crossrefs

Sequence in context: A152635 A152643 A152638 * A152632 A152640 A152641

Adjacent sequences: A152633 A152634 A152635 * A152637 A152638 A152639

Keyword

nonn

Author

R. H. Hardin, Dec 10 2008

Status

approved