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A083631 Starting positions of strings of three 7's in the decimal expansion of Pi. 1
1589, 1590, 4575, 5241, 5242, 5322, 5323, 5355, 5450, 5863, 5864, 11298, 11733, 12661, 14292, 15501, 17234, 17502, 18516, 19903, 20404, 21423, 21571, 23538, 23749, 24373, 25551, 25788, 25858, 26796, 29504, 29505, 30988, 32478, 32479 (list; graph; refs; listen; history; text; internal format)
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

q=9!; z=7; a=RealDigits[Pi, 10, q]; lst={}; Do[b=a[[1]][[n]]; c=a[[1]][[n+1]]; d=a[[1]][[n+2]]; If[b==z&&c==z&&d==z, AppendTo[lst, n-1]], {n, q-2}]; lst (* Vladimir Joseph Stephan Orlovsky, Jun 19 2009 *)

CROSSREFS

Cf. A050254 (two 7's), A083632 (four 7's).

Sequence in context: A224942 A224950 A233378 * A224938 A083632 A224939

Adjacent sequences:  A083628 A083629 A083630 * A083632 A083633 A083634

KEYWORD

base,nonn

AUTHOR

Rick L. Shepherd, May 04 2003

STATUS

approved

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Last modified September 21 07:08 EDT 2019. Contains 327253 sequences. (Running on oeis4.)