A276779 - OEIS

A276779

a(n) = floor(log_10(1/error(n))), where error(n) is the error in the n-th iteration of the cubic Borwein-Borwein algorithm for computing 1/Pi.

6, 22, 71, 218, 659, 1985, 5963, 17898, 53704, 161124, 483384, 1450164, 4350505, 13051531, 39154610, 117463847, 301029987, 301029987

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

REFERENCES

J. M. Borwein and P. B. Borwein, Pi and the AGM, Wiley, 1987.

LINKS

D. H. Bailey, J. M. Borwein, P. B. Borwein, and S. Plouffe, The Quest for Pi, Mathematical Intelligencer, vol. 19, no. 1 (Jan. 1997), 50-57.

Lucas A. Brown, Python program.

Doron Zeilberger, Jonathan Borwein (1951-2016), a PiONEER of Experimental Mathematics, Experimental Mathematics Seminar, Rutgers University, Sep 15 2016.

CROSSREFS

KEYWORD

nonn,hard,more

AUTHOR

EXTENSIONS

Revised definition and terms a(11)-a(18) from Lucas A. Brown, May 05 2023

STATUS

approved