A083626 Starting positions of strings of four 6's in the decimal expansion of Pi.

21880, 29868, 32427, 43523, 48439, 48440, 59983, 64870, 74392, 100537, 102387, 102388, 124494, 131591, 140744, 140745, 141919, 147343, 151265, 161077, 162317, 166974, 180722, 194824, 200045, 226102, 250129, 250130, 252499, 252500, 252501

Offset: 1

Author

Rick L. Shepherd, May 03 2003

Keywords

• base
• nonn

Links

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

Crossrefs

Cf. A083625 (three 6's), A083627 (five 6's).

Programs

Mathematica

Transpose[StringPosition[StringDrop[ToString[N[Pi,9! ]],2],"6666"]][[1]] (* Vladimir Joseph Stephan Orlovsky, Jun 19 2009 *)
Flatten[Position[Partition[RealDigits[Pi,10,260000][[1]],4,1], {6,6,6,6}]]-1 (* Harvey P. Dale, Apr 27 2012 *)