OFFSET
0,3
LINKS
M. Lal, Iterates of the unitary totient function, Math. Comp., 28 (1974), 301-302.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, May 01 2013
EXTENSIONS
a(16)-a(32) from Donovan Johnson, May 02 2013
STATUS
approved