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A066367
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The floor(p(n)/n)-perfect numbers, where p(n) denotes the n-th prime and f-perfect numbers for an arithmetical function f are defined in A066218.
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0
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OFFSET
| 1,1
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LINKS
| J. Pe, On a Generalization of Perfect Numbers, J. Rec. Math., 31(3) (2002-2003), 168-172.
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MATHEMATICA
| f[x_] := Floor[Prime[x] / x]; Select[ Range[2, 10^5], 2 * f[ # ] == Apply[ Plus, Map[ f, Divisors[ # ] ] ] & ] There do not seem to be any more terms. There are no terms between 170 and 10^5.
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CROSSREFS
| Cf. A066218.
Sequence in context: A106714 A106819 A045968 * A098036 A127269 A071781
Adjacent sequences: A066364 A066365 A066366 * A066368 A066369 A066370
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KEYWORD
| nonn
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AUTHOR
| Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Dec 21 2001
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