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A135235
Numbers n such that n=s^phi(s) where s is sum of its digits.
3
1, 2, 34012224
OFFSET
1,2
COMMENTS
Next term has 417 digits. In fact the sequence has only four terms and a(4)=400^160.
EXAMPLE
34012224=(3+4+0+1+2+2+2+4)^phi(3+4+0+1+2+2+2+4) so 34012224 is in the sequence.
CROSSREFS
KEYWORD
base,fini,nonn,bref
AUTHOR
Farideh Firoozbakht, Nov 24 2007
STATUS
approved