OFFSET
0,1
COMMENTS
1/zeta(9) is the probability that 9 randomly selected numbers will be coprime.
LINKS
Karl-Heinz Hofmann, Table of n, a(n) for n = 0..10000
Wikipedia, Riemann zeta function.
FORMULA
Equals 1/A013667.
From Amiram Eldar, Jun 01 2023: (Start)
Equals Sum_{k>=1} mu(k)/k^9, where mu is the Möbius function (A008683).
Equals Product_{p prime} (1 - 1/p^9). (End)
EXAMPLE
0.997995632730762156864676132105099996320941848...
MATHEMATICA
RealDigits[1/Zeta[9], 10, 100][[1]]
PROG
(PARI) 1/zeta(9)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Karl-Heinz Hofmann, Jun 04 2021
STATUS
approved