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A182817 Number of elements a in Z/nZ such that a^n=a, for nonprime n. 0
1, 2, 4, 2, 3, 4, 4, 4, 9, 2, 4, 4, 9, 4, 4, 5, 4, 3, 8, 8, 2, 9, 4, 9, 4, 4, 9, 4, 8, 4, 15, 4, 4, 7, 4, 9, 8, 4, 9, 4, 9, 4, 8, 4, 9, 2, 25, 24, 4, 9, 16, 4, 4, 9, 8, 9, 8, 4, 3, 4, 8, 25, 4, 9, 4, 8, 49, 4, 9, 4, 9, 4, 4, 9, 4, 8, 4, 45, 4, 4, 8, 9, 8, 8, 9, 4, 15, 4, 9, 8, 11, 4, 9, 8, 5, 8, 2, 9, 16, 8, 49, 4, 9, 4, 8, 8, 9, 4, 9, 4, 25, 4, 9, 8, 8, 4, 27, 16, 9, 8, 4, 9, 4, 9, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This is a reduced version of A182816, without the "trivial" terms a(n)=n for prime indices n.

LINKS

Table of n, a(n) for n=1..125.

"Lunkwill", Carmichael numbers and Fermat primality, Dec 02 2010.

FORMULA

a(n) = A182816(A018252(n)).

CROSSREFS

Cf. A182816, A002997.

Sequence in context: A182742 A320156 A054240 * A082864 A134447 A093056

Adjacent sequences:  A182814 A182815 A182816 * A182818 A182819 A182820

KEYWORD

nonn

AUTHOR

M. F. Hasler, Dec 05 2010

STATUS

approved

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Last modified October 22 18:31 EDT 2019. Contains 328319 sequences. (Running on oeis4.)