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A019762 Decimal expansion of 2*e. 3
5, 4, 3, 6, 5, 6, 3, 6, 5, 6, 9, 1, 8, 0, 9, 0, 4, 7, 0, 7, 2, 0, 5, 7, 4, 9, 4, 2, 7, 0, 5, 3, 2, 4, 9, 9, 5, 5, 1, 4, 4, 9, 4, 1, 8, 7, 3, 9, 9, 9, 1, 9, 1, 4, 9, 9, 3, 3, 9, 3, 5, 2, 5, 5, 4, 4, 8, 1, 5, 3, 2, 6, 0, 7, 0, 7, 0, 9, 5, 1, 8, 9, 1, 4, 2, 7, 6, 4, 3, 5, 7, 0, 5, 0, 3, 3, 2, 8, 5, 4, 8, 5, 4, 9, 3 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Simple continued fraction is A081750. - Michael Somos, May 07 2012

Equals sum_{n>=1} n^2/n!. - Arkadiusz Wesolowski, Mar 11 2013

Equals lim_{x->1} (x*e^x - e)/(x-1).  Also 2e = sum_{n>=0} sum_{k=0..n} 1/n!. - Richard R. Forberg, Dec 23 2014

LINKS

Ivan Panchenko, Table of n, a(n) for n = 1..1000

EXAMPLE

2*e = 5.43656365691809047072057494270532499551449418739991914993...

MATHEMATICA

RealDigits[N[2*E, 105]][[1]] (* Arkadiusz Wesolowski, Mar 11 2013 *)

CROSSREFS

Cf. A081750.

Sequence in context: A205449 A164360 A183164 * A256099 A192918 A092156

Adjacent sequences:  A019759 A019760 A019761 * A019763 A019764 A019765

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified April 27 15:06 EDT 2017. Contains 285528 sequences.