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A247451 Largest primorial factor of n-th least product of primorial numbers, cf. A025487. 4
1, 2, 2, 6, 2, 6, 2, 6, 30, 2, 6, 6, 30, 2, 6, 6, 30, 2, 6, 30, 6, 210, 6, 30, 2, 6, 30, 6, 210, 6, 30, 2, 6, 30, 6, 210, 6, 30, 30, 2, 30, 6, 210, 6, 30, 6, 210, 6, 30, 30, 2, 30, 6, 2310, 210, 6, 30, 6, 210, 6, 30, 30, 2, 30, 6, 2310, 210, 6, 30, 30, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A007947(A025487(n)) = A002110(A061394(n)).

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

PROG

(Haskell)

a247451 n = a247451_list !! (n-1)

a247451_list = map a007947 a025487_list

CROSSREFS

Cf. A007947, A025487, A002110, A061394.

Sequence in context: A071796 A121699 A080404 * A167268 A278162 A187223

Adjacent sequences:  A247448 A247449 A247450 * A247452 A247453 A247454

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Sep 17 2014

STATUS

approved

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Last modified February 23 21:20 EST 2020. Contains 332195 sequences. (Running on oeis4.)