A347932 - OEIS

A347932

Least m such that the first n digits (after the decimal point) of e and Sum_{k=0..m} 1/k! are the same.

4, 5, 6, 7, 9, 9, 10, 11, 12, 13, 14, 16, 16, 16, 17, 18, 19, 20, 20, 22, 22, 22, 23, 24, 24, 26, 26, 27, 28, 28, 29, 30, 30, 31, 31, 32, 33, 33, 34, 35, 35, 36, 36, 37, 38, 38, 39, 40, 40, 41, 42, 42, 43, 43, 44, 45, 45, 46, 46, 47, 48, 48, 49, 50, 50

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..65.

MATHEMATICA

a[n_] := Module[{e = Floor[10^n*E], s = 0, k = 0}, While[Floor[10^n*s] != e, s += 1/k!; k++]; k - 1]; Array[a, 65] (* Amiram Eldar, Sep 20 2021 *)

CROSSREFS

Cf. A001113.

Sequence in context: A068521 A196697 A068318 * A242337 A201739 A329782

Adjacent sequences: A347929 A347930 A347931 * A347933 A347934 A347935

KEYWORD

nonn,base

AUTHOR

Angad Singh, Sep 20 2021

STATUS

approved