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A080404 a(n)=A007947[A055932(n)]; the sequence consists of primorial numbers;. 4
2, 2, 6, 2, 6, 2, 6, 6, 30, 2, 6, 6, 6, 30, 2, 6, 30, 6, 6, 30, 2, 6, 30, 6, 30, 6, 210, 6, 30, 2, 30, 6, 30, 6, 30, 6, 210, 6, 30, 30, 6, 2, 30, 6, 30, 210, 6, 30, 30, 6, 30, 210, 6, 30, 30, 6, 2, 210, 30, 6, 30, 210, 6, 30, 30, 6, 210, 30, 6, 30, 210, 6, 30, 210, 30, 6, 2, 210, 30, 30, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Michael De Vlieger, Table of n, a(n) for n = 1..10000

MATHEMATICA

With[{P = FoldList[Times, Prime@ Range@ Max@ #]}, Map[P[[#]] &, #]] &@ Map[PrimeNu@ # &, Select[Range[10^4], Last[#] == Length[#] &@ PrimePi@ FactorInteger[#][[All, 1]] &]] (* Michael De Vlieger, Feb 06 2020 *)

CROSSREFS

Cf. A007947, A002110, A055932.

Sequence in context: A278159 A071796 A121699 * A247451 A167268 A278162

Adjacent sequences:  A080401 A080402 A080403 * A080405 A080406 A080407

KEYWORD

nonn

AUTHOR

Labos Elemer, Mar 19 2003

STATUS

approved

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Last modified June 21 16:32 EDT 2021. Contains 345365 sequences. (Running on oeis4.)