

A083643


Starting positions of strings of four 9's in the decimal expansion of Pi.


2



762, 763, 764, 17988, 19437, 19446, 19447, 22753, 31900, 42095, 56988, 56989, 81293, 120564, 140953, 161862, 161863, 177122, 182604, 191104, 193034, 193035, 193036, 204198, 210140, 211794, 220507, 220568, 220569, 224317, 235425, 235775
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..32.
Index entries for sequences related to the number Pi
Dave Andersen, PiSearch Page
Eric Weisstein's World of Mathematics, Pi Digits.


MATHEMATICA

Transpose[StringPosition[StringDrop[ToString[N[Pi, 9! ]], 2], "9999"]][[1]] (* Vladimir Joseph Stephan Orlovsky, Jun 19 2009 *)


CROSSREFS

Cf. A083642 (three 9's), A083644 (five 9's).
Sequence in context: A139664 A160033 A083642 * A083644 A061225 A253615
Adjacent sequences: A083640 A083641 A083642 * A083644 A083645 A083646


KEYWORD

base,nonn


AUTHOR

Rick L. Shepherd, May 05 2003


STATUS

approved



