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A092605 Decimal expansion of e^(-1/2). 12
6, 0, 6, 5, 3, 0, 6, 5, 9, 7, 1, 2, 6, 3, 3, 4, 2, 3, 6, 0, 3, 7, 9, 9, 5, 3, 4, 9, 9, 1, 1, 8, 0, 4, 5, 3, 4, 4, 1, 9, 1, 8, 1, 3, 5, 4, 8, 7, 1, 8, 6, 9, 5, 5, 6, 8, 2, 8, 9, 2, 1, 5, 8, 7, 3, 5, 0, 5, 6, 5, 1, 9, 4, 1, 3, 7, 4, 8, 4, 2, 3, 9, 9, 8, 6, 4, 7, 6, 1, 1, 5, 0, 7, 9, 8, 9, 4, 5, 6, 0, 2, 6, 4, 2, 3 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

For x = e^(-1/2), the largest prime factor of a random integer n is equally likely to be above or below n^x. - Charles R Greathouse IV, May 25 2009

LINKS

Table of n, a(n) for n=0..104.

FORMULA

Equals Sum_{k>=0} (-1)^k/(2^k * k!) = Sum_{k>=0} (-1)^k/A000165(k). - Amiram Eldar, Aug 15 2020

EXAMPLE

0.6065306597126334...

MATHEMATICA

RealDigits[E^-(1/2), 10, 120][[1]] (* Harvey P. Dale, Jul 23 2012 *)

CROSSREFS

Cf. A000165, A001113, A019774, A068985.

Sequence in context: A097715 A316710 A198499 * A180318 A004016 A093577

Adjacent sequences:  A092602 A092603 A092604 * A092606 A092607 A092608

KEYWORD

cons,nonn

AUTHOR

Mohammad K. Azarian, Apr 22 2004

STATUS

approved

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Last modified May 6 09:45 EDT 2021. Contains 343580 sequences. (Running on oeis4.)