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A048940
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Starting position of the first occurrence of a string of at least n '9's in the decimal expansion of Pi.
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19
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5, 44, 762, 762, 762, 762, 1722776, 36356642, 564665206, 20148132310, 27014073304, 897831316556, 5758910552709, 5758910552709
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OFFSET
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1,1
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COMMENTS
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Pi digits 3,1,4,... are indexed 0,1,2,... Note that this is different from other sequences such as A049522, A084073 which use indices 1,2,3,... For example, the position of the curious accumulation of six 9s is called 762 here; the same position is called 763 in A049522, A084073. - Jeppe Stig Nielsen, Aug 21 2017
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LINKS
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David G. Andersen, The Pi-Search Page. (Yields, as of today, an incorrect result of 66780105 for the first occurrence of eight "9"s. - M. F. Hasler, Mar 19 2017)
Eric Weisstein's World of Mathematics, Pi Digits
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MATHEMATICA
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Module[{m, nn = 7}, m = First@ RealDigits@ N[Pi, 10^nn]; Array[ SequencePosition[m, ConstantArray[9, #]][[1, 1]] - 1 &, nn]] (* Michael De Vlieger, Mar 20 2017 *)
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CROSSREFS
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Cf. A000796: Decimal expansion (or digits) of Pi.
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KEYWORD
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nonn,base,more
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AUTHOR
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EXTENSIONS
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More terms from Colin Martin (cbmartin(AT)tpg.com.au), Mar 03 2002
a(12) from Yasumasa Kanada Laboratory, 2002 and a(13)-a(14) from Shigeru Kondo, 2011 added by Dmitry Petukhov, Dec 23 2019
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STATUS
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approved
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