A083610 Starting positions of strings of three 3's in the decimal expansion of Pi.

1698, 4928, 6917, 7651, 8413, 8736, 8828, 12520, 17614, 21973, 22580, 22704, 22749, 23471, 25094, 25179, 28467, 28468, 28469, 30583, 32631, 33095, 35838, 37507, 38597, 41392, 42438, 42734, 45756, 48033, 48207, 48369, 49287, 50547, 52794

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=3; 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 *)
Flatten[Position[Partition[RealDigits[Pi, 10, 53000][[1]], 3, 1], {3, 3, 3}]]-1 (* Harvey P. Dale, Mar 05 2015 *)

Crossrefs

Cf. A050222 (two 3's), A083611 (four 3's).

Sequence in context: A301985 A237845 A340170 * A020405 A091368 A356213

Adjacent sequences: A083607 A083608 A083609 * A083611 A083612 A083613

Keyword

base,nonn

Author

Rick L. Shepherd, May 01 2003

Status

approved