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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A322718 Number of times the digit 3 appears in the first 10^n decimal digits of Euler's number e = exp(1), counting starts after the decimal point. 9
0, 8, 109, 1008, 10035, 100228, 1001716, 10005176, 100002498, 999982936 (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]="3" then C:=C+1; fi;

  od;

  return(C);

end;

MATHEMATICA

Table[Count[IntegerDigits[IntegerPart[(E - 2)*10^10^n]], 3], {n, 7}] (* Robert Price, Apr 07 2019 *)

CROSSREFS

Cf. A001113, A099294, A322644, A322715, A322716, A322717, A322719, A322720, A322721, A322722, A322723, A322724.

Sequence in context: A273057 A095917 A259233 * A309188 A098623 A297971

Adjacent sequences:  A322715 A322716 A322717 * A322719 A322720 A322721

KEYWORD

nonn,base,more

AUTHOR

Martin Renner, Dec 24 2018

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 28 04:24 EDT 2021. Contains 347698 sequences. (Running on oeis4.)