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

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.

Links

Table of n, a(n) for n=1..3.

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

Cf. A135234, A135236, A135237.

Sequence in context: A296627 A247214 A367833 * A334022 A263645 A367834

Adjacent sequences: A135232 A135233 A135234 * A135236 A135237 A135238

Keyword

base,fini,nonn,bref

Author

Farideh Firoozbakht, Nov 24 2007

Status

approved