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A322724 Number of times the digit 9 appears in the first 10^n decimal digits of Euler's number e = exp(1), counting starts after the decimal point. 9
0, 10, 112, 968, 9863, 99691, 1000278, 9997209, 99998052, 999992793 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

It is not known if e is normal, but the distribution of decimal digits found for the first 10^n digits of e shows no statistically significant departure from a uniform distribution.

LINKS

Table of n, a(n) for n=1..10.

Eric Weisstein's World of Mathematics, e Digits.

MAPLE

a:=proc(n)

  local digits, EXP1, C, i;

  digits:=10^n+100;

  EXP1:=convert(frac(evalf[digits](exp(1))), string)[2..digits-99];

  C:=0;

  for i from 1 to length(EXP1) do

    if EXP1[i]="9" then C:=C+1; fi;

  od;

  return(C);

end;

CROSSREFS

Cf. A001113, A099300, A322650, A322715, A322716, A322717, A322718, A322719, A322720, A322721, A322722, A322723.

Sequence in context: A210507 A066275 A046164 * A184131 A239651 A014484

Adjacent sequences:  A322721 A322722 A322723 * A322725 A322726 A322727

KEYWORD

nonn,base,more

AUTHOR

Martin Renner, Dec 24 2018

STATUS

approved

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Last modified February 21 10:49 EST 2019. Contains 320372 sequences. (Running on oeis4.)