This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 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 "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

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

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