A159731 Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 5 local maxima.

0, 0, 2988, 27458352, 61383379820, 81667937763552, 85059308335953056, 77970400876665940256, 66589111000653219026676, 54577055338226000658293040, 43623618238133057304530730072, 34310058645060995324654729060496, 26688777245272247361239042667969036

Offset

1,3

Links

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

Prog

(PARI) \\ CircPeaksBySig defined in A334778.
a(n) = {CircPeaksBySig(vector(n, i, 4), [5])[1]} \\ Andrew Howroyd, May 14 2020

Crossrefs

Cf. A159727, A159728, A334778.

Sequence in context: A231623 A349063 A108926 * A221725 A205241 A317398

Adjacent sequences: A159728 A159729 A159730 * A159732 A159733 A159734

Keyword

nonn

Author

R. H. Hardin, Apr 20 2009

Extensions

Terms a(7) and beyond from Andrew Howroyd, May 14 2020

Status

approved