

A060334


The sequence A006863 (shifted by one) seems to be counting the periodic points for a map. If so, then this is the sequence of the numbers of orbits of length n.


0



24, 108, 160, 60, 48, 10800, 0, 1980, 3136, 1272, 48, 5440, 0, 480, 11408, 1020, 0, 7671552, 0, 53448, 7200, 216, 48, 179520, 0, 480, 2128, 240, 48, 227138600, 0
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..31.
Y. Puri and T. Ward, Arithmetic and growth of periodic orbits, J. Integer Seqs., Vol. 4 (2001), #01.2.1.
T. Ward, Exactly realizable sequences


FORMULA

If b(n) is the (n+1)st term of A006863, then a(n)=(1/n)* Sum_{dn}\mu(d)b(n/d)


EXAMPLE

a(3) = 160 because the 4th term of A006863 is 504 and the 2nd term is 24, so there should be (50424)/3 = 160 orbits of length 3.


CROSSREFS

Cf. A006863, A060171, A060479.
Sequence in context: A013980 A100150 A305950 * A271915 A187163 A211577
Adjacent sequences: A060331 A060332 A060333 * A060335 A060336 A060337


KEYWORD

easy,nonn


AUTHOR

Thomas Ward, Apr 10 2001


STATUS

approved



