A050215 Starting positions of strings of 2 2's in the decimal expansion of Pi.

135, 185, 484, 535, 661, 687, 824, 964, 1070, 1397, 1735, 1736, 1840, 1889, 1890, 1910, 2036, 2042, 2140, 2278, 2279, 2372, 2376, 2377, 2412, 2432, 2527, 2551, 2651, 3019, 3080, 3389, 3402, 3434, 3435, 3604, 3883, 3944, 3988, 4233, 4375

Offset: 1

Author

Eric W. Weisstein

Keywords

• nonn
• base

Links

• Eric Weisstein's World of Mathematics, Pi Digits
• Index entries for sequences related to the number Pi

Crossrefs

Cf. A000796.

Programs

Mathematica

a=RealDigits[Pi,10,7! ];lst={};Do[b=a[[1]][[n]];c=a[[1]][[n+1]];If[b==2&&c==2,AppendTo[lst,n-1]],{n,7!-1}];lst (* Vladimir Joseph Stephan Orlovsky, Jun 07 2009 *)