A152508 1/10 of the number of permutations of 4 indistinguishable copies of 1..n with exactly 6 local maxima.

0, 0, 42, 1836695, 10530242387, 29832986150825, 60695128902586540, 103817995457729295887, 161328267155502711433605, 237364194180589518867292325, 338385077937653019716292059598, 473635313924991038119333176290875, 655918703527056982804817522787817607

Offset

1,3

Links

Andrew Howroyd, Table of n, a(n) for n = 1..200

Prog

(PARI) \\ PeaksBySig defined in A334774.
a(n) = {PeaksBySig(vector(n, i, 4), [5])[1]/10} \\ Andrew Howroyd, May 12 2020

Crossrefs

Cf. A152504, A334774.

Sequence in context: A348820 A147687 A364220 * A238637 A070177 A173866

Adjacent sequences: A152505 A152506 A152507 * A152509 A152510 A152511

Keyword

nonn

Author

R. H. Hardin, Dec 06 2008

Extensions

Terms a(8) and beyond from Andrew Howroyd, May 12 2020

Status

approved