A083606 Starting positions of strings of three 2's in the decimal expansion of Pi.

1735, 1889, 2278, 2376, 3434, 4902, 4903, 7911, 7964, 7965, 9203, 9293, 9334, 10427, 11704, 12486, 12487, 12857, 13040, 13562, 13725, 14668, 16679, 17619, 17882, 19099, 19479, 21576, 25469, 26266, 26959, 27433, 29447, 30291, 30454, 30527

Offset

1,1

Links

Table of n, a(n) for n=1..36.

Index entries for sequences related to the number Pi

Dave Andersen, Pi-Search Page

Eric Weisstein's World of Mathematics, Pi Digits.

Mathematica

a=RealDigits[Pi, 10, 7*7! ]; lst={}; Do[b=a[[1]][[n]]; c=a[[1]][[n+1]]; d=a[[1]][[n+2]]; If[b==2&&c==2&&d==2, AppendTo[lst, n-1]], {n, 6!, 7*7!-2}]; lst (* Vladimir Joseph Stephan Orlovsky, Jun 07 2009 *)
#-1&/@(Flatten[Position[Union[#]&/@Partition[RealDigits[Pi, 10, 35000][[1]], 3, 1], {2}]]) (* Harvey P. Dale, Oct 01 2011 *)
SequencePosition[RealDigits[Pi, 10, 35000][[1]], {2, 2, 2}][[;; , 1]]-1 (* Harvey P. Dale, Apr 09 2023 *)

Crossrefs

Cf. A050215 (two 2's), A083607 (four 2's).

Sequence in context: A179914 A113701 A283385 * A280927 A095847 A253696

Adjacent sequences: A083603 A083604 A083605 * A083607 A083608 A083609

Keyword

base,nonn,changed

Author

Rick L. Shepherd, May 01 2003

Status

approved