A099295 - OEIS

A099295

Number of times the digit 4 appears in the first 10^n digits of Pi.

1, 10, 93, 1012, 9971, 100230, 1001093, 10003863, 100011958, 999937688, 10000032702, 100000357857

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OFFSET

1,2

REFERENCES

Alfred S. Posamentier & Ingmar Lehmann, A Biography of the World's Most Mysterious Number, Prometheus Books, Amherst, NY 2004, page 129.

LINKS

Table of n, a(n) for n=1..12.

Kanada Laboratory, Statistical Distribution Information.

Eric Weisstein's World of Mathematics, Pi Digits

MATHEMATICA

$MaxPrecision = 1100000; dp = Drop[ RealDigits[Pi, 10, 1000010] [[1]], 1]; Table[ Count[ Take[dp, 10^n], 4], {n, 6}]

Module[{pid=RealDigits[Pi, 10, 10^7][[1]], ac}, ac=Accumulate[If[#==4, 1, 0]&/@pid]; Table[ac[[10^n]], {n, 7}]] (* Generates the first 7 terms of the sequence. *) (* Harvey P. Dale, Jan 07 2020 *)

CROSSREFS

Cf. A099291, A099292, A099293, A099294, A099296, A099297, A099298, A099299, A099300.

Sequence in context: A190989 A375246 A224696 * A167589 A192899 A192900

Adjacent sequences: A099292 A099293 A099294 * A099296 A099297 A099298

KEYWORD

nonn,base

AUTHOR

Robert G. Wilson v, Oct 11 2004

STATUS

approved