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!)
A204687 A204321(n)/4. 0
1, 3, 33, 4323, 74748993, 22349647743307203, 1998027016999666984531472383425633, 15968447842642350164774423714587589071259011612916483703599782377123 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Terms of the sequence can be presented as products of the following distinct prime factors: 1, 3, 3*11, 3*11*131, 3*11*131*17291, 3*11*131*17291*298995971. Alexander R. Povolotsky, Jan 19 2012

Those factors are A121897(m) for m >= 5. - Alexander R. Povolotsky, Jun 17 2012

LINKS

Table of n, a(n) for n=1..8.

FORMULA

a(n) = product(A126604(k), k=2...n) for n >= 2.

CROSSREFS

Cf. A204321, A126604, A121897.

Sequence in context: A126675 A038694 A319750 * A134477 A080985 A006854

Adjacent sequences:  A204684 A204685 A204686 * A204688 A204689 A204690

KEYWORD

nonn

AUTHOR

Alexander R. Povolotsky, Jan 19 2012

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 September 26 16:43 EDT 2020. Contains 337374 sequences. (Running on oeis4.)