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!)
A175711 Primes p such that p-th semiprime=r*k and r>=p>=k. 0

%I #5 Feb 02 2015 05:23:48

%S 2,3,5,7,11,29,41,43,47,53,59,67,73,97,107,109,113,137,149,151,167,

%T 179,191,193,211,227,229,233,241,263,269,277,281,307,311,317,359,373,

%U 379,383,389,449,457,487,491,499,521,563,571,577,587,593,607,631,661,677

%N Primes p such that p-th semiprime=r*k and r>=p>=k.

%C a(1)=2 because 2nd semiprime=3*2 and 3>2=2, a(2)=3 because 3rd semiprime=3*3 and 3=3=3, a(3)=5 because 5th semiprime=7*2 and 7>5>2.

%Y Cf. A084126, A084127.

%K nonn

%O 1,1

%A _Juri-Stepan Gerasimov_, Aug 12 2010

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 April 24 13:00 EDT 2024. Contains 371945 sequences. (Running on oeis4.)