A229099 Decimal expansion of 1 - 6/Pi^2.

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

Offset

0,1

Comments

Probability that a random number is not squarefree; probability that two random numbers have a common divisor greater than 1.

Links

Charles R Greathouse IV, Table of n, a(n) for n = 0..10000

Index entries for transcendental numbers

Formula

Equals 1 - 1/zeta(2). - Stefano Spezia, Feb 21 2025

Example

0.39207289814597337133672322074163416657384735196652070692634580863496...

Mathematica

RealDigits[1-1/Zeta[2], 10, 90][[1]] (* Stefano Spezia, Feb 21 2025 *)

Prog

(PARI) 1-6/Pi^2

Crossrefs

Cf. A000796, A002388, A013661, A059956, A063035.

Sequence in context: A179430 A016048 A256501 * A021259 A194807 A114875

Adjacent sequences: A229096 A229097 A229098 * A229100 A229101 A229102

Keyword

nonn,cons,easy,changed

Author

Charles R Greathouse IV, Sep 13 2013

Status

approved