login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A069047 Denominator(sum(i=1,n,1/i^4))/denominator(sum(i=1,n,1/i^3)). 0
1, 2, 6, 12, 60, 540, 3780, 7560, 2520, 2520, 27720, 27720, 360360, 360360, 360360, 720720, 12252240, 110270160, 2095133040, 10475665200, 1496523600, 1496523600, 34420042800, 34420042800, 34420042800, 34420042800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..26.

CROSSREFS

Sequence in context: A090951 A168262 A085819 * A095921 A106037 A136240

Adjacent sequences:  A069044 A069045 A069046 * A069048 A069049 A069050

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Apr 03 2002

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 July 24 10:53 EDT 2021. Contains 346273 sequences. (Running on oeis4.)