A152511 1/60 of the number of permutations of 5 indistinguishable copies of 1..n with exactly 4 local maxima.

0, 1, 4194, 5825786, 5682784528, 4873147413516, 3978083870212150, 3186605615943562016, 2534375865966184697328, 2010275266425805924583168, 1593002777198909770195152928, 1261900375041824878511515546368, 999492236937050258502770760302080, 791616311022376735886612880860890112

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, 5), [3])[1]/60} \\ Andrew Howroyd, May 12 2020

Crossrefs

Cf. A152509, A334774.

Sequence in context: A202530 A242770 A234723 * A252316 A103614 A210330

Adjacent sequences: A152508 A152509 A152510 * A152512 A152513 A152514

Keyword

nonn

Author

R. H. Hardin, Dec 06 2008

Extensions

Terms a(7) and beyond from Andrew Howroyd, May 12 2020

Status

approved