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
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 13 2012
STATUS
approved