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A254081 Number of primitive (=aperiodic) n-bead necklaces with colored beads of exactly 9 different colors. 2
40320, 1632960, 38102400, 673596000, 10035083520, 133102569600, 1623972430080, 18615386790000, 203401119841920, 2140495978400640, 21860934514473600, 217932712305073920, 2130148393318725120, 20485620162998625600, 194378546540211264000, 1823813323809879402000 (list; graph; refs; listen; history; text; internal format)
OFFSET

9,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 9..1000

MAPLE

with(numtheory):

b:= proc(n, k) option remember; `if`(n=0, 1,

      add(mobius(n/d)*k^d, d=divisors(n))/n)

    end:

a:= n-> add(b(n, 9-j)*binomial(9, j)*(-1)^j, j=0..9):

seq(a(n), n=9..30);

CROSSREFS

Column k=9 of A254040.

Sequence in context: A029576 A179966 A133068 * A228911 A213878 A179063

Adjacent sequences:  A254078 A254079 A254080 * A254082 A254083 A254084

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jan 25 2015

STATUS

approved

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Last modified October 20 02:16 EDT 2021. Contains 348099 sequences. (Running on oeis4.)