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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A050339 Number of factorizations with 2 levels of parentheses indexed by prime signatures. A050338(A025487). 4
1, 1, 4, 4, 10, 16, 30, 54, 22, 75, 74, 176, 102, 206, 267, 535, 399, 518, 950, 526, 1585, 154, 1094, 1446, 1344, 3091, 2252, 4527, 817, 4158, 4879, 3357, 9809, 8811, 12664, 3605, 14653, 3005, 15738, 8429, 10479, 29762, 4777, 16863, 31883, 34631 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..46.

CROSSREFS

Sequence in context: A185784 A185904 A201618 * A087288 A185779 A095009

Adjacent sequences:  A050336 A050337 A050338 * A050340 A050341 A050342

KEYWORD

nonn

AUTHOR

Christian G. Bower, Oct 15 1999

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 December 9 08:20 EST 2019. Contains 329877 sequences. (Running on oeis4.)