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!)
A068565 Denominators of Sum_{k=1..n} 1/(k * 2^k). 2

%I #13 Jun 26 2019 11:03:30

%S 2,8,3,192,960,1920,1680,215040,645120,64512,1419264,11354112,

%T 147603456,295206912,46126080,47233105920,802962800640,802962800640,

%U 15256293212160,61025172848640,61025172848640,122050345697280

%N Denominators of Sum_{k=1..n} 1/(k * 2^k).

%C Sum_{k>=1} 1/(k * 2^k) = log(2).

%o (PARI) a(n) = denominator(sum(k=1, n, 1/(k * 2^k))); \\ _Michel Marcus_, Jun 26 2019

%Y Cf. A068566.

%K easy,frac,nonn

%O 1,1

%A _Benoit Cloitre_, Mar 25 2002

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 March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)