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A048940 Starting position of the first occurrence of a string of at least n '9's in the decimal expansion of Pi. 19
5, 44, 762, 762, 762, 762, 1722776, 36356642, 564665206 (list; graph; refs; listen; history; text; internal format)



a(10) > 11*10^9 - 1. - Eric W. Weisstein, Jul 20 2013


Table of n, a(n) for n=1..9.

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, Feynman Point

Eric Weisstein's World of Mathematics, Pi Digits


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 *)


Cf. A000796: Decimal expansion (or digits) of Pi.

First occurrence of n times the same digit: A035117 (n '1's), A050281 (n '2's), A050282, A050283, A050284, A050286, A050287, A048940 (n '9's).

First occurrence of exactly n times the same digit: A096755 (exactly n '1's), A096756, A096757, A096758, A096759, A096760, A096761, A096762, A096763 (exactly n '9's), A050279 (exactly n '0's).

First occurrence of n: A176341; of concatenate(1,...,n): A121280 = A068987 - 1.

Sequence in context: A222059 A252931 A229396 * A218375 A058792 A113948

Adjacent sequences:  A048937 A048938 A048939 * A048941 A048942 A048943




Eric W. Weisstein


More terms from Colin Martin (cbmartin(AT)tpg.com.au), Mar 03 2002

Edited by M. F. Hasler, Mar 19 2017



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Last modified May 26 15:16 EDT 2017. Contains 287096 sequences.