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!)
A046317 Odd numbers divisible by exactly 4 primes (counted with multiplicity). 5

%I

%S 81,135,189,225,297,315,351,375,441,459,495,513,525,585,621,625,693,

%T 735,765,783,819,825,837,855,875,975,999,1029,1035,1071,1089,1107,

%U 1155,1161,1197,1225,1269,1275,1287,1305,1365,1375,1395,1425,1431,1449,1521

%N Odd numbers divisible by exactly 4 primes (counted with multiplicity).

%H Zak Seidov, <a href="/A046317/b046317.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..1000 from Harvey P. Dale)

%t Select[Range[1,1601,2],PrimeOmega[#]==4&] (* _Harvey P. Dale_, Aug 15 2014 *)

%Y Cf. A014613.

%K nonn

%O 1,1

%A _Patrick De Geest_, Jun 15 1998

%E Offset corrected by _Zak Seidov_, May 03 2020

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 May 7 03:48 EDT 2021. Contains 343636 sequences. (Running on oeis4.)