A083604 Starting positions of strings of six 1's in the decimal expansion of Pi.

255945, 2645268, 3218870, 4657555, 4657556, 5130874, 5425806, 5961931, 6653783, 9036112, 11867965, 13249047, 13255651, 15684440, 18548887, 20316848, 22107705, 22564362, 23503699, 28388441, 28580580, 29435972, 30584158, 31678241

Offset: 1

Author

Rick L. Shepherd, May 01 2003

Keywords

• base
• nonn

Links

• Dave Andersen, Pi-Search Page
• Eric Weisstein's World of Mathematics, Pi Digits.
• Index entries for sequences related to the number Pi

Crossrefs

Cf. A083603 (five 1's), A083605 (seven 1's).

Programs

Mathematica

$MaxPrecision=10^8;a=RealDigits[Pi,10,8*9! ];lst={};Do[b=a[[1]][[n]];c=a[[1]][[n+1]];d=a[[1]][[n+2]];e=a[[1]][[n+3]];f=a[[1]][[n+4]];g=a[[1]][[n+5]];If[b==1&&c==1&&d==1&&e==1&&f==1&&g==1,AppendTo[lst,n-1]],{n,2*8!,8*9!-5}];lst (* Vladimir Joseph Stephan Orlovsky, Jun 07 2009 *)
SequencePosition[RealDigits[Pi,10,32*10^6][[1]],{1,1,1,1,1,1}][[All,1]]-1 (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 04 2018 *)