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A065472 Decimal expansion of product(1 - 1/(p+1)^2), p prime >= 2). 3
7, 7, 5, 8, 8, 3, 5, 1, 0, 0, 0, 3, 8, 9, 5, 4, 9, 9, 6, 2, 0, 4, 0, 4, 2, 8, 4, 4, 2, 7, 9, 0, 0, 6, 1, 1, 4, 8, 2, 4, 1, 3, 4, 6, 5, 9, 7, 3, 0, 1, 6, 2, 7, 6, 2, 2, 1, 0, 6, 3, 1, 1, 6, 4, 6, 1, 3, 8, 7, 6, 4, 9, 2, 4, 9, 7, 4, 5, 6, 9, 9, 5, 3, 7, 1, 9, 3, 1, 3, 2, 3, 3, 1, 2, 8, 1, 4, 2 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..97.

G. Niklasch, Some number theoretical constants: 1000-digit values [Cached copy]

EXAMPLE

0.7758835100038954996204042844279...

MATHEMATICA

digits = 98; Exp[NSum[(-1)^n*(2^(n-1)-2)*PrimeZetaP[n-1]/(n-1), {n, 3, Infinity}, WorkingPrecision -> 2 digits, Method -> "AlternatingSigns"]] // RealDigits[#, 10, digits]& // First (* Jean-Fran├žois Alcover, Apr 18 2016 *)

CROSSREFS

Cf. A038063, A078091, A116393.

Sequence in context: A278811 A021932 A244675 * A081112 A096151 A021567

Adjacent sequences:  A065469 A065470 A065471 * A065473 A065474 A065475

KEYWORD

cons,nonn

AUTHOR

N. J. A. Sloane, Nov 19 2001

EXTENSIONS

Definition corrected by Dan Asimov, Apr 15 2006

STATUS

approved

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Last modified December 8 11:03 EST 2016. Contains 278939 sequences.