The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A083607 Starting positions of strings of four 2's in the decimal expansion of Pi. 2
 4902, 7964, 12486, 43405, 50271, 55736, 62920, 65260, 65261, 71778, 83521, 97191, 98423, 103025, 105290, 123462, 125053, 125172, 125656, 138493, 138655, 150949, 162191, 192255, 196397, 204561, 204850, 209562, 216368, 216660, 267139, 272809 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Dave Andersen, Pi-Search Page Eric Weisstein's World of Mathematics, Pi Digits. MATHEMATICA \$MaxPrecision=10^8; a=RealDigits[Pi, 10, 9! ]; lst={}; Do[b=a[[1]][[n]]; c=a[[1]][[n+1]]; d=a[[1]][[n+2]]; e=a[[1]][[n+3]]; If[b==2&&c==2&&d==2&&e==2, AppendTo[lst, n-1]], {n, 6*6!, 9!-3}]; lst (* Vladimir Joseph Stephan Orlovsky, Jun 07 2009 *) With[{p=Partition[Rest[RealDigits[Pi, 10, 300000][[1]]], 4, 1]}, Flatten[ Position[ p, {2, 2, 2, 2}]]] (* Harvey P. Dale, Oct 10 2011 *) CROSSREFS Cf. A083606 (three 2's), A083608 (five 2's). Sequence in context: A107545 A256363 A031568 * A168028 A031834 A031634 Adjacent sequences:  A083604 A083605 A083606 * A083608 A083609 A083610 KEYWORD base,nonn AUTHOR Rick L. Shepherd, May 01 2003 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 14 07:32 EDT 2021. Contains 342946 sequences. (Running on oeis4.)