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A135235 Numbers n such that n=s^phi(s) where s is sum of its digits. 3

%I #3 Mar 30 2012 17:37:44

%S 1,2,34012224

%N Numbers n such that n=s^phi(s) where s is sum of its digits.

%C Next term has 417 digits. In fact the sequence has only four terms and a(4)=400^160.

%e 34012224=(3+4+0+1+2+2+2+4)^phi(3+4+0+1+2+2+2+4) so 34012224 is in the sequence.

%Y Cf. A135234, A135236, A135237.

%K base,fini,nonn,bref

%O 1,2

%A _Farideh Firoozbakht_, Nov 24 2007

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Last modified July 17 19:13 EDT 2024. Contains 374377 sequences. (Running on oeis4.)