A083642 Starting positions of strings of three 9's in the decimal expansion of Pi.

762, 763, 764, 765, 2949, 7759, 8527, 9962, 11197, 11382, 13019, 16687, 17119, 17561, 17988, 17989, 18680, 19437, 19438, 19446, 19447, 19448, 19748, 21579, 22309, 22753, 22754, 23989, 24107, 25584, 26069, 26490, 27602, 28122, 28320

Offset

1,1

Links

Table of n, a(n) for n=1..35.

Index entries for sequences related to the number Pi

Dave Andersen, Pi-Search Page

Eric Weisstein's World of Mathematics, Pi Digits.

Mathematica

Transpose[ StringPosition[ StringDrop[ ToString[ N[Pi, 28588]], 2], "999"]][[1]]
Flatten[With[{p=Partition[RealDigits[Pi, 10, 30000][[1]], 3, 1]}, Position[p, {9, 9, 9}]]]-1 (* Harvey P. Dale, Jan 05 2013 *)

Crossrefs

Cf. A050272 (two 9's), A083643 (four 9's).

Sequence in context: A141144 A139664 A160033 * A083643 A083644 A061225

Adjacent sequences: A083639 A083640 A083641 * A083643 A083644 A083645

Keyword

base,nonn

Author

Rick L. Shepherd, May 05 2003

Status

approved