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!)
A154648 Primes of the form n^2 - 13. 5

%I #14 Sep 08 2022 08:45:40

%S 3,23,131,311,563,887,1283,2903,5171,7043,8087,9203,10391,12983,14387,

%T 19031,28211,34583,39191,41603,44087,46643,51971,57587,76163,86423,

%U 101111,108887,125303,129587,138371,142871,161591,171383,191831,197123

%N Primes of the form n^2 - 13.

%C Primes of the form 4n^2 - 8n - 9.

%H Vincenzo Librandi, <a href="/A154648/b154648.txt">Table of n, a(n) for n = 1..3000</a>

%e For n=3, a(3)=3; n=7, a(7)=131; n=241, a(241)=230387

%t Select[Range[4,1000]^2-13,PrimeQ]

%o (Magma) [a: n in [4..600] | IsPrime(a) where a is n^2-13];

%Y Cf. A154650

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Jan 18 2009

%E Edited by _N. J. A. Sloane_, Jun 23 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 March 29 18:29 EDT 2024. Contains 371280 sequences. (Running on oeis4.)