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!)
A206941 a(n) = phi(lambda(n)), where phi = A000010, lambda = A002322. 3
1, 1, 1, 1, 2, 1, 2, 1, 2, 2, 4, 1, 4, 2, 2, 2, 8, 2, 6, 2, 2, 4, 10, 1, 8, 4, 6, 2, 12, 2, 8, 4, 4, 8, 4, 2, 12, 6, 4, 2, 16, 2, 12, 4, 4, 10, 22, 2, 12, 8, 8, 4, 24, 6, 8, 2, 6, 12, 28, 2, 16, 8, 2, 8, 4, 4, 20, 8, 10, 4, 24, 2, 24, 12, 8, 6, 8, 4, 24, 2, 18 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

REFERENCES

W. J. LeVeque, Topics in Number Theory. Addison-Wesley, Reading, MA, 2 vols., 1956, Vol. 1, p. 55, Theorem 4.10.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

R. D. Carmichael, Note on a new number theory function, Bull. Amer. Math. Soc. 16 (1909-10), 232-238.

MATHEMATICA

Table[EulerPhi@ CarmichaelLambda@ n, {n, 96}] (* Michael De Vlieger, Mar 18 2016 *)

PROG

(Haskell)

a206941 = a000010 . a002322 -- Reinhard Zumkeller, Feb 18 2012

(PARI) a(n)=eulerphi(lcm(znstar(n)[2])) \\ Charles R Greathouse IV, Feb 21 2013

CROSSREFS

Cf. A000010, A002322, A077197.

Sequence in context: A181776 A243036 A230224 * A327790 A143179 A349867

Adjacent sequences:  A206938 A206939 A206940 * A206942 A206943 A206944

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Feb 13 2012

STATUS

approved

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 August 16 14:26 EDT 2022. Contains 356168 sequences. (Running on oeis4.)