A050208 - OEIS

A050208

Starting positions of strings of 2 1's in the decimal expansion of Pi.

94, 153, 154, 174, 362, 395, 427, 437, 445, 494, 709, 758, 846, 921, 983, 984, 1129, 1185, 1349, 1503, 1534, 1656, 1849, 1896, 2458, 2497, 2724, 2740, 2779, 2904, 3253, 3398, 3493, 3503, 3504, 3534, 3735, 3822, 3844, 3847, 3963, 3992, 3993

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Pi Digits

Index entries for sequences related to the number Pi

MATHEMATICA

a=RealDigits[Pi, 10, 8! ]; lst={}; Do[b=a[[1]][[n]]; c=a[[1]][[n+1]]; If[b==1&&c==1, AppendTo[lst, n-1]], {n, 8!-1}]; lst (* Vladimir Joseph Stephan Orlovsky, Jun 02 2009 *)

Flatten[Position[Partition[RealDigits[Pi, 10, 4000][[1]], 2, 1], _?(#=={1, 1}&) ]]-1 (* Harvey P. Dale, Dec 01 2013 *)

SequencePosition[RealDigits[Pi, 10, 4000][[1]], {1, 1}][[;; , 1]]-1 (* Harvey P. Dale, Jul 08 2024 *)

CROSSREFS

Cf. A037008, A037000, A037001, A037002, A037003, A037004, A037005, A036974, A037006, A037007, A014777, A134212, A134213, A134214, A134215, A134216, A134217, A134218, A134218, A134219.

Sequence in context: A020355 A039551 A100767 * A035117 A096755 A050965

Adjacent sequences: A050205 A050206 A050207 * A050209 A050210 A050211

KEYWORD

nonn,base

AUTHOR

Eric W. Weisstein

EXTENSIONS

Edited by N. J. A. Sloane, Aug 10 2010

STATUS

approved