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A305814 a(n) = Product_{d|n, d>1} prime(A305788(d)-1). 3
1, 2, 2, 6, 3, 20, 2, 42, 10, 66, 2, 660, 2, 20, 42, 546, 13, 1700, 2, 3762, 12, 20, 5, 106260, 6, 20, 110, 660, 5, 106260, 2, 15834, 20, 806, 30, 2075700, 2, 20, 44, 1079694, 2, 6600, 5, 660, 4830, 170, 2, 42822780, 10, 660, 754, 660, 5, 691900, 12, 106260, 44, 170, 2, 2731625820, 2, 20, 660, 680862, 114, 17000, 2, 113646, 30, 56100, 5 (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 operating on GF(2)[X]-polynomials

FORMULA

a(n) = Product_{d|n} A008578(A305788(d)).

PROG

(PARI) A305814(n) = { my(m=1); fordiv(n, d, if(d>1, m *= prime(A305788(d)-1))); (m); }; \\ Needs also code from A305788.

CROSSREFS

Cf. A008578, A278233, A305788, A305812, A305815 (rgs-transform).

Sequence in context: A129889 A263673 A304987 * A266479 A296147 A130712

Adjacent sequences:  A305811 A305812 A305813 * A305815 A305816 A305817

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jun 11 2018

STATUS

approved

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Last modified June 26 04:11 EDT 2019. Contains 324369 sequences. (Running on oeis4.)