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A152507
1/5 of the number of permutations of 4 indistinguishable copies of 1..n with exactly 5 local maxima.
1
0, 0, 1268, 5299607, 8184246829, 8518545179048, 7375381060406666, 5823800163847281553, 4385124494281967244359, 3220844410144729325085834, 2335142573256061888321206228, 1681577911560502131835994578291, 1206702021031355908214429714812273
OFFSET
1,3
LINKS
PROG
(PARI) \\ PeaksBySig defined in A334774.
a(n) = {PeaksBySig(vector(n, i, 4), [4])[1]/5} \\ Andrew Howroyd, May 12 2020
CROSSREFS
Sequence in context: A231838 A231699 A238286 * A203100 A351678 A273000
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 06 2008
EXTENSIONS
Terms a(8) and beyond from Andrew Howroyd, May 12 2020
STATUS
approved