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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A046311 Numbers that are divisible by at least 9 primes (counted with multiplicity). 4
512, 768, 1024, 1152, 1280, 1536, 1728, 1792, 1920, 2048, 2304, 2560, 2592, 2688, 2816, 2880, 3072, 3200, 3328, 3456, 3584, 3840, 3888, 4032, 4096, 4224, 4320, 4352, 4480, 4608, 4800, 4864, 4992, 5120, 5184, 5376, 5632, 5760, 5832, 5888, 6048, 6144 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

John Cerkan, Table of n, a(n) for n = 1..10000

FORMULA

Product p_i^e_i with Sum e_i >= 9.

a(n) = n + O(n (log log n)^7/log n). - Charles R Greathouse IV, Apr 07 2017

MATHEMATICA

Select[Range[6200], PrimeOmega[#]>8&] (* Harvey P. Dale, May 20 2013 *)

PROG

(PARI) is(n)=bigomega(n)>8 \\ Charles R Greathouse IV, Sep 17 2015

CROSSREFS

Subsequence of A033987, A046304, A046305, A046307, and A046309.

Cf. A046312.

Sequence in context: A234136 A248536 A202461 * A036333 A046312 A045033

Adjacent sequences:  A046308 A046309 A046310 * A046312 A046313 A046314

KEYWORD

nonn

AUTHOR

Patrick De Geest, Jun 15 1998

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 January 23 02:57 EST 2019. Contains 319368 sequences. (Running on oeis4.)