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A136134 Primes in A136133 (integer log of harmonic numbers sequence). 0
3, 5, 743, 59, 312408461, 13669, 10920223, 85691034670497287, 795398356293665458781, 14301636907, 4280339305565030602944575375011 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..10.

MATHEMATICA

sopfr = Function[x, Plus @@ Map[Times @@ # &, FactorInteger[x]]]; Select[sopfr /@ HarmonicNumber[Range[100]], PrimeQ]

CROSSREFS

Cf. A136133, A136121, A136122, A001008, A002805.

Sequence in context: A247699 A320939 A002427 * A119497 A298094 A012783

Adjacent sequences:  A136131 A136132 A136133 * A136135 A136136 A136137

KEYWORD

nonn

AUTHOR

Carlos Alves, Dec 16 2007

STATUS

approved

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Last modified December 1 05:20 EST 2021. Contains 349426 sequences. (Running on oeis4.)