Revision History for A322719
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| A322719
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Number of times the digit 4 appears in the first 10^n decimal digits of Euler's number e = exp(1), counting starts after the decimal point.
(history;
published version)
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#9 by Bruno Berselli at Mon Apr 08 03:12:09 EDT 2019
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#8 by Michel Marcus at Mon Apr 08 00:49:06 EDT 2019
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#7 by Michel Marcus at Mon Apr 08 00:48:59 EDT 2019
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| MATHEMATICA
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Table[Count[IntegerDigits[IntegerPart[(E - 2)*10^10^n]], 4], {n, , 7}] (* _Robert Price_, Apr 07 2019 *)
7}] (* Robert Price, Apr 07 2019 *)
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proposed
editing
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Discussion
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| Mon Apr 08
| 00:49
| Michel Marcus: ok ?
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#6 by Robert Price at Sun Apr 07 18:05:45 EDT 2019
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#5 by Robert Price at Sun Apr 07 18:05:43 EDT 2019
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| MATHEMATICA
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Table[Count[IntegerDigits[IntegerPart[(E - 2)*10^10^n]], 4], {n,
7}] (* Robert Price, Apr 07 2019 *)
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| STATUS
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approved
editing
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#4 by N. J. A. Sloane at Mon Dec 24 11:06:29 EST 2018
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#3 by Martin Renner at Mon Dec 24 10:54:45 EST 2018
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#2 by Martin Renner at Mon Dec 24 10:43:02 EST 2018
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| NAME
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allocatedNumber of times the digit 4 appears in the first 10^n decimal digits of Euler's number e = exp(1), counting starts after forthe Martindecimal Rennerpoint.
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| DATA
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1, 11, 100, 982, 10039, 100389, 1000307, 9998285, 100018922, 1000026506
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| OFFSET
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1,2
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| COMMENTS
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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.
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| LINKS
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Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/eDigits.html">e Digits</a>.
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| MAPLE
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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]="4" then C:=C+1; fi;
od;
return(C);
end;
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| CROSSREFS
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Cf. A001113, A099295, A322645, A322715, A322716, A322717, A322718, A322720, A322721, A322722, A322723, A322724.
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| KEYWORD
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allocated
nonn,base,more
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| AUTHOR
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Martin Renner, Dec 24 2018
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| STATUS
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approved
editing
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#1 by Martin Renner at Mon Dec 24 10:27:44 EST 2018
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allocated for Martin Renner
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| KEYWORD
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allocated
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| STATUS
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approved
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