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!)
A135719 a(n) is the index of the smallest Carmichael number (A002997) with n prime divisors, or 0 if no such number exists. 3

%I #25 Apr 20 2024 07:42:14

%S 1,11,40,403,1224,4886,19096,120137,485941,2974628,25293838

%N a(n) is the index of the smallest Carmichael number (A002997) with n prime divisors, or 0 if no such number exists.

%H Claude Goutier, <a href="http://www-labs.iro.umontreal.ca/~goutier/OEIS/A055553/">Compressed text file carm10e22.gz containing all the Carmichael numbers up to 10^22</a>.

%H Richard Pinch, <a href="http://s369624816.websitehome.co.uk/rgep/cartable.html">Tables relating to Carmichael numbers</a> (All the Carmichael numbers up to 10^18).

%F A002997(a(n)) = A006931(n). - _M. F. Hasler_, Apr 14 2015

%Y Cf. A002997, A135717, A006931.

%K nonn,more,changed

%O 3,2

%A _Artur Jasinski_, Nov 25 2007

%E a(8)-a(11) from _Donovan Johnson_, Feb 23 2012

%E a(12) from _Amiram Eldar_, Jul 08 2019

%E Escape clause added by _Jianing Song_, Dec 12 2021

%E a(13) calculated using data from _Claude Goutier_ and added by _Amiram Eldar_, Apr 20 2024

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 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)