OFFSET
1,1
EXAMPLE
phi(3775375)=10^phi(3)+10^phi(7)+10^phi(7)+10^phi(5)+10^phi(3)+
10^phi(7)+10^phi(5).
CROSSREFS
KEYWORD
base,nonn,bref
AUTHOR
Farideh Firoozbakht, May 11 2008
STATUS
approved