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A152516
1/21 of the number of permutations of 6 indistinguishable copies of 1..n with exactly 5 local maxima.
1
0, 5, 285365, 3328373375, 23122804891093, 132106319858700205, 697701196338306192217, 3568377130807709398000279, 18013809185839252548978200161, 90462608845509339028810174966669, 453352973288072573009512458761236141, 2270154484704085339079608424120307696559
OFFSET
1,2
LINKS
PROG
(PARI) \\ PeaksBySig defined in A334774.
a(n) = {PeaksBySig(vector(n, i, 6), [4])[1]/21} \\ Andrew Howroyd, May 12 2020
CROSSREFS
Sequence in context: A237641 A057679 A123751 * A295532 A240132 A067509
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 06 2008
EXTENSIONS
Terms a(7) and beyond from Andrew Howroyd, May 12 2020
STATUS
approved