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A050272
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Starting positions of strings of 2 9's in the decimal expansion of Pi.
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1
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44, 79, 459, 705, 747, 762, 763, 764, 765, 766, 777, 1063, 1073, 1385, 1395, 1428, 1477, 1532, 1730, 1981, 2000, 2071, 2114, 2218, 2241, 2285, 2335, 2436, 2644, 2796, 2910, 2949, 2950, 3089, 3217, 3294, 3508, 3564, 3570, 3673, 3678, 3710
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OFFSET
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1,1
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LINKS
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Eric Weisstein's World of Mathematics, Pi Digits
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MATHEMATICA
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q=8!; z=9; a=RealDigits[Pi, 10, q]; lst={}; Do[b=a[[1]][[n]]; c=a[[1]][[n+1]]; If[b==z&&c==z, AppendTo[lst, n-1]], {n, q-1}]; lst (* Vladimir Joseph Stephan Orlovsky, Jun 19 2009 *)
Transpose[SequencePosition[RealDigits[Pi, 10, 4000][[1]], {9, 9}]][[1]]-1 (* The program uses the SequencePosition function from Mathematica version 10 *) (* Harvey P. Dale, Dec 27 2015 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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