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A079541
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Numbers n such that phi(n) = d(n).
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0
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OFFSET
| 1,2
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COMMENTS
| Duplicate of A020488. Peter Luschny, Aug 26 2011
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REFERENCES
| D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, p. 11.
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MATHEMATICA
| Select[Range[500], EulerPhi[#]==DivisorSigma[0, #]&] (* From Harvey P. Dale, June 18 2011 *)
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CROSSREFS
| Cf. A000010, A000005, A063070.
Sequence in context: A143144 A020488 A064435 * A131725 A032914 A088072
Adjacent sequences: A079538 A079539 A079540 * A079542 A079543 A079544
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KEYWORD
| nonn,fini,full,dead
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jan 23 2003
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EXTENSIONS
| Corrected by Harvey P. Dale, June 18 2011.
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