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A139412
Numbers n such that phi(n)=10^phi(d_1)+10^phi(d_2)+...+10^phi(d_k) where d_1d_2...d_k is the decimal expansion of n.
1
231, 34386, 3775375
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
Sequence in context: A201957 A152500 A066370 * A027551 A172861 A068750
KEYWORD
base,nonn,bref
AUTHOR
Farideh Firoozbakht, May 11 2008
STATUS
approved