A116393 - OEIS

A116393

Decimal expansion of Product(1 - 1/(p+1)^3), p prime >= 2.

9, 4, 0, 3, 0, 0, 4, 1, 4, 5, 7, 0, 3, 4, 5, 0, 7, 0, 6, 1, 9, 4, 6, 5, 3, 8, 5, 3, 7, 3, 2, 3, 9, 4, 4, 9, 9, 9, 8, 5, 7, 4, 0, 1, 4, 3, 6, 9, 1, 3, 0, 0, 7, 2, 5, 7, 0, 3, 1, 3, 3, 8, 3, 0, 5, 9, 4, 7, 4, 6, 2, 1, 0, 4, 5, 5, 4, 5, 7, 8, 0, 1, 2, 6, 7, 0, 4

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OFFSET

0,1

COMMENTS

Calculated from A065465 * A065467^3 * X / A065466^2 where X = 1.03108637675008536... = product[ 1+ (4p^13 +13p^12 +10p^11 -3p^10 -9p^9 -12p^8 -9p^7 +6p^5 +4p^4 +2p^3 +p^2 -p -1) /(p^5+p^4-1)^3 / (p^3+p^2-1) / (p+1)] over prime p >=2. - R. J. Mathar, Sep 10 2007

LINKS

Table of n, a(n) for n=0..86.

EXAMPLE

0.9403004...

PROG

(PARI) prodeulerrat(1 - 1/(p+1)^3) \\ Amiram Eldar, Nov 29 2020

CROSSREFS

Cf. A065472.

Sequence in context: A193109 A242069 A197828 * A359285 A355283 A198111

Adjacent sequences: A116390 A116391 A116392 * A116394 A116395 A116396

KEYWORD

nonn,cons