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A081876
a(n) is the starting position of the second occurrence of a string of the initial n decimal digits of Pi in the decimal expansion of Pi.
1
9, 137, 2120, 3496, 88008, 176451, 25198140, 50366472, 1660042751, 7902183159, 260816757309, 1142905318634, 17475119650043, 43420162171515
OFFSET
1,1
COMMENTS
The digits 3 1 4 1 5 ... are labeled 0, 1, 2, 3, 4, ...
a(9) > 10^8. - Robert G. Wilson v, May 09 2003
a(15) > 50*10^12. - Dmitry Petukhov, Oct 27 2021
REFERENCES
Alfred S. Posamentier & Ingmar Lehmann, A Biography of the World's Most Mysterious Number, Prometheus Books, Amherst, NY 2004, page 134.
LINKS
Dave Andersen, The Pi-Search Page
Yasumasa Kanada Laboratory Home Page, Computer Centre, The University of Tokyo, Statistical Distribution Information.
Timothy Mullican, 50 trillion digits of pi
Harry J. Smith, Computing Pi [Broken link]
Harry J. Smith, Computing Pi
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Harry J. Smith, Apr 12 2003
EXTENSIONS
a(9) from Felix Fröhlich, Oct 04 2016
a(10)-a(11) from Andreas Stiller, Apr 08 2019
a(12) from Robert G. Wilson v, Oct 21 2004
a(13) from Dmitry Petukhov, Jan 27 2020
a(14) from Dmitry Petukhov, Oct 27 2021
STATUS
approved