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

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A046317 Odd numbers divisible by exactly 4 primes (counted with multiplicity). 5
81, 135, 189, 225, 297, 315, 351, 375, 441, 459, 495, 513, 525, 585, 621, 625, 693, 735, 765, 783, 819, 825, 837, 855, 875, 975, 999, 1029, 1035, 1071, 1089, 1107, 1155, 1161, 1197, 1225, 1269, 1275, 1287, 1305, 1365, 1375, 1395, 1425, 1431, 1449, 1521 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..1000

Eric Weisstein's World of Mathematics, Prime Triplet.

MATHEMATICA

Select[Range[1, 1601, 2], PrimeOmega[#]==4&] (* Harvey P. Dale, Aug 15 2014 *)

CROSSREFS

Cf. A014613.

Sequence in context: A119943 A001245 A186463 * A046374 A153259 A207050

Adjacent sequences:  A046314 A046315 A046316 * A046318 A046319 A046320

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 | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified November 26 03:41 EST 2014. Contains 250017 sequences.