A152507 1/5 of the number of permutations of 4 indistinguishable copies of 1..n with exactly 5 local maxima.
0, 0, 1268, 5299607, 8184246829, 8518545179048, 7375381060406666, 5823800163847281553, 4385124494281967244359, 3220844410144729325085834, 2335142573256061888321206228, 1681577911560502131835994578291, 1206702021031355908214429714812273
Offset: 1
Keywords
Links
- Andrew Howroyd, Table of n, a(n) for n = 1..200
Programs
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PARI
\\ PeaksBySig defined in A334774. a(n) = {PeaksBySig(vector(n,i,4), [4])[1]/5} \\ Andrew Howroyd, May 12 2020
Extensions
Terms a(8) and beyond from Andrew Howroyd, May 12 2020