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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A064167 Product of numerator and denominator of the n-th harmonic number, 1 + 1/2 + 1/3 +...+ 1/n. 0
1, 6, 66, 300, 8220, 980, 50820, 213080, 17965080, 18600120, 2320468920, 2384502120, 412970037480, 422245703880, 430902992520, 1756076802480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Numerator and denominator in definition have no common divisors >1.

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

The 3rd harmonic number is 11/6. So a(3) = 11 * 6 = 66.

CROSSREFS

Sequence in context: A045641 A071276 A119172 * A175455 A185253 A192089

Adjacent sequences:  A064164 A064165 A064166 * A064168 A064169 A064170

KEYWORD

nonn

AUTHOR

Leroy Quet, Sep 19 2001

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified January 19 22:02 EST 2018. Contains 297938 sequences.