login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A178965 a(n) = numerator of sum(floor(n/k)/2^k, k=1..inf) 0
0, 1, 5, 15, 43, 103, 263, 591, 1391, 3103, 7007, 15039, 33983, 72063, 156543, 334591, 722687, 1510911, 3255807, 6773759, 14433279, 30193663, 63535103, 131264511, 278589439, 575004671 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..25.

EXAMPLE

a(3)=15 because sum(floor(3/k)/2^k, k=1..inf)=15/8

MATHEMATICA

Table[Numerator[Sum[Floor[n/k]/2^k, {k, 1, Infinity}]], {n, 0, 25}]

CROSSREFS

Sequence in context: A111295 A200760 A032193 * A005665 A025471 A064453

Adjacent sequences:  A178962 A178963 A178964 * A178966 A178967 A178968

KEYWORD

nonn

AUTHOR

Vladimir Reshetnikov, Dec 31 2010

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 18 06:48 EDT 2019. Contains 322209 sequences. (Running on oeis4.)