A317944 - OEIS

A317944

a(n) = Product_{d|n, d>1} prime(A286378(d)-1).

1, 2, 3, 4, 5, 18, 7, 8, 33, 50, 13, 108, 17, 98, 285, 16, 23, 2178, 29, 500, 651, 338, 37, 648, 185, 578, 1353, 1372, 43, 162450, 47, 32, 2067, 1058, 2065, 143748, 61, 1682, 3417, 5000, 71, 847602, 73, 8788, 247665, 2738, 83, 3888, 581, 68450, 6141, 19652, 97, 3661218, 6565, 19208, 8961, 3698, 107, 92596500, 109, 4418, 809193, 64

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

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

Index entries for sequences related to Stern's sequences

FORMULA

a(n) = Product_{d|n, d>1} A008578(A286378(d)).

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

PROG

(PARI)

\\ Needs also code from A286378: