OFFSET
0,1
LINKS
G. Niklasch, Some number theoretical constants: 1000-digit values. [Cached copy]
G. Niklasch, 1000-digit value.
EXAMPLE
0.90192603958708217137771520255047...
MATHEMATICA
$MaxExtraPrecision = 500; digits = 98; terms = 500; P[n_] := PrimeZetaP[n]; LR = Join[{0, 0, 0, 0}, LinearRecurrence[{0, 2, 0, 0, 0, -1}, {-4, 0, -6, 0, -12, 0}, terms + 10]]; r[n_Integer] := LR[[n]]; Exp[NSum[r[n]*P[n - 1]/(n - 1), {n, 3, terms}, NSumTerms -> terms, WorkingPrecision -> digits + 10]] // RealDigits[#, 10, digits]& // First (* Jean-François Alcover, Apr 18 2016 *)
PROG
(PARI) prodeulerrat(1 - 1/(p^2*(p^2-1))) \\ Amiram Eldar, Mar 16 2021
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
N. J. A. Sloane, Nov 19 2001
STATUS
approved