The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A322722 Number of times the digit 7 appears in the first 10^n decimal digits of Euler's number e = exp(1), counting starts after the decimal point. 9
1, 16, 99, 1008, 9875, 99910, 1000813, 9998342, 99997536, 1000013049 (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
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]="7" then C:=C+1; fi;
od;
return(C);
end;
MATHEMATICA
Table[Count[IntegerDigits[IntegerPart[(E - 2)*10^10^n]], 7], {n, 7}] (* Robert Price, Apr 07 2019 *)
CROSSREFS
Sequence in context: A283545 A297684 A344866 * A014762 A045784 A354877
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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 13 22:21 EDT 2024. Contains 373391 sequences. (Running on oeis4.)