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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 (list; graph; refs; listen; history; text; internal format)
 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 Peter Trüb, 22.4 trillion digits of pi CROSSREFS Cf. A000796, A048940, A166028. Sequence in context: A309189 A231757 A156975 * A139760 A112702 A296394 Adjacent sequences:  A081873 A081874 A081875 * A081877 A081878 A081879 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

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Last modified August 18 13:09 EDT 2022. Contains 356212 sequences. (Running on oeis4.)