OFFSET
1,2
COMMENTS
Next term is greater than 3*10^8.
LINKS
Hiroaki Yamanouchi, Table of n, a(n) for n = 1..4065
EXAMPLE
227826131 is in the sequence because phi(227826131) = phi(2)^phi(2) * phi(2)^phi(2) * phi(7)^phi(7) * phi(8)^phi(8) * phi(2)^phi(2) * phi(6)^phi(6) * phi(1)^phi(1) * phi(3)^phi(3) * phi(1)^phi(1).
MATHEMATICA
Do[h=IntegerDigits[m]; l=Length[h]; If[Min[h]>0&&EulerPhi[m]==Product[ EulerPhi[h[[k]]]^EulerPhi[h[[k]]], {k, l}], Print[m]], {m, 300000000}]
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Farideh Firoozbakht, Mar 29 2005
EXTENSIONS
a(26)-a(28) from Hiroaki Yamanouchi, Sep 08 2014
STATUS
approved