[go: up one dir, main page]
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A152092 Smallest number m such that sigma(m) is an n-almost prime. 5
2, 3, 6, 14, 21, 42, 93, 186, 381, 651, 1302, 2667, 5334, 11811, 23622, 49146, 82677, 165354, 344022, 761763, 1523526, 2752491, 5332341, 10664682, 21845397, 43690794, 85327221, 170654442, 341310837, 677207307, 1354414614, 2796546858, 6192353757, 10836557067 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..34.
EXAMPLE
a(32) = 2796546858. Sigma(2796546858) = 6442450944 = 2^31*3^1 (32-almost prime).
CROSSREFS
Cf. A000203.
Sequence in context: A282351 A193093 A182756 * A187033 A087293 A250022
Adjacent sequences: A152089 A152090 A152091 * A152093 A152094 A152095
KEYWORD
nonn
AUTHOR
Donovan Johnson, Nov 24 2008
EXTENSIONS
a(33)-a(34) from Donovan Johnson, Jul 25 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 29 13:55 EDT 2024. Contains 375517 sequences. (Running on oeis4.)