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A305794 a(n) = Product_{d|n, d>1} prime(A286622(d)-1). 4
1, 2, 3, 4, 5, 18, 7, 8, 15, 50, 11, 108, 11, 98, 195, 16, 5, 450, 11, 500, 357, 242, 19, 648, 55, 242, 345, 1372, 19, 76050, 29, 32, 165, 50, 385, 13500, 17, 242, 627, 5000, 17, 254898, 31, 5324, 30225, 722, 37, 3888, 77, 6050, 345, 5324, 31, 238050, 2255, 19208, 627, 722, 41, 29659500, 37, 1682, 76755, 64, 275, 54450, 11, 500, 969, 296450, 19, 405000, 17 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..8192

FORMULA

a(n) = Product_{d|n, d>1} A008578(A286622(d)).

For all k >= 0, a(2^k) = 2^k.

PROG

(PARI) A305794(n) = { my(m=1); fordiv(n, d, if(d>1, m *= prime(A286622(d)-1))); (m); }; \\ Needs also code from A286622.

CROSSREFS

Cf. A008578, A278222, A286622, A305792, A305795 (rgs-transform).

Cf. also A304104.

Sequence in context: A030574 A283653 A162657 * A317944 A145520 A061412

Adjacent sequences:  A305791 A305792 A305793 * A305795 A305796 A305797

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jun 11 2018

STATUS

approved

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Last modified August 17 05:38 EDT 2018. Contains 313810 sequences. (Running on oeis4.)