A083621 Starting positions of strings of four 5's in the decimal expansion of Pi.

24466, 24467, 33172, 39861, 39862, 46512, 52352, 106626, 129828, 135904, 147625, 159619, 162812, 167310, 205034, 205035, 205193, 205194, 219639, 234924, 244453, 244454, 244455, 249745, 253209, 253210, 253211, 267581, 288855, 314518, 319921

Offset

1,1

Links

Table of n, a(n) for n=1..31.

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, 9! ]], 2], "5555"]][[1]] (* Vladimir Joseph Stephan Orlovsky, Jun 19 2009 *)
SequencePosition[RealDigits[Pi, 10, 320000][[1]], {5, 5, 5, 5}][[All, 1]]-1 (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 15 2019 *)

Crossrefs

Cf. A083620 (three 5's), A083622 (five 5's).

Sequence in context: A156844 A174754 A206682 * A083622 A237207 A224423

Adjacent sequences: A083618 A083619 A083620 * A083622 A083623 A083624

Keyword

base,nonn

Author

Rick L. Shepherd, May 02 2003

Status

approved