The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A152512 1/6 of the number of permutations of 5 indistinguishable copies of 1..n with exactly 5 local maxima. 1

%I #6 May 12 2020 16:26:39

%S 0,1,51408,331072352,1080698915350,2691500727775616,

%T 5953257961411738328,12474940206857421730672,

%U 25498614004537897031551640,51527434528518884637847012176,103587934174554666918594336695328,207763415020909344351469183584249792

%N 1/6 of the number of permutations of 5 indistinguishable copies of 1..n with exactly 5 local maxima.

%H Andrew Howroyd, <a href="/A152512/b152512.txt">Table of n, a(n) for n = 1..200</a>

%o (PARI) \\ PeaksBySig defined in A334774.

%o a(n) = {PeaksBySig(vector(n,i,5), [4])[1]/6} \\ _Andrew Howroyd_, May 12 2020

%Y Cf. A152509, A334774.

%K nonn

%O 1,3

%A _R. H. Hardin_, Dec 06 2008

%E Terms a(7) and beyond from _Andrew Howroyd_, May 12 2020

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 13 07:22 EDT 2024. Contains 372498 sequences. (Running on oeis4.)