login
A152502
1/12 of the number of permutations of 3 indistinguishable copies of 1..n with exactly 5 local maxima.
1
0, 0, 1, 7274, 6251162, 2764274116, 897380159188, 247392790837624, 62200280199674352, 14820288466400312448, 3420153590479988396800, 774303834249035054901248, 173288568985609322651099136, 38513999874946087671220207616, 8524401267844398602674455314432
OFFSET
1,4
LINKS
PROG
(PARI) \\ PeaksBySig defined in A334774.
a(n) = {PeaksBySig(vector(n, i, 3), [4])[1]/12} \\ Andrew Howroyd, May 12 2020
CROSSREFS
Sequence in context: A253529 A297880 A084276 * A251226 A260000 A303876
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 06 2008
EXTENSIONS
Terms a(9) and beyond from Andrew Howroyd, May 12 2020
STATUS
approved