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!)
A156252 Primes of the form 4*n^2+6*n+43. 2

%I #17 Sep 08 2022 08:45:41

%S 43,53,71,97,131,173,223,281,347,421,503,593,691,797,911,1033,1163,

%T 1301,1447,1601,1933,2111,2297,2693,2903,3121,3347,3581,3823,4073,

%U 4597,4871,5153,5443,5741,6047,6361,7013,7351,8783,9161,9547,9941,10343,10753

%N Primes of the form 4*n^2+6*n+43.

%C 4*n^2+6*n+43 is a prime number for all n up to 19.

%C Subsequence of A005846. (Substitute n=2k+1 in the definition of A005846 to show this.) [_R. J. Mathar_, Feb 19 2009]

%H Vincenzo Librandi, <a href="/A156252/b156252.txt">Table of n, a(n) for n = 1..1000</a>

%H Vincenzo Librandi, <a href="http://mathforum.org/kb/message.jspa?messageID=310692">Prime Generating Polynomials</a>.

%t Select[Table[4*n^2+6*n+43,{n,0,700}],PrimeQ] (* _Vincenzo Librandi_, Jul 26 2012 *)

%o (Magma) [a: n in [0..100] | IsPrime(a) where a is 4*n^2+6*n+43 ]; // _Vincenzo Librandi_, Jul 26 2012

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Feb 07 2009

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 25 06:49 EDT 2024. Contains 371964 sequences. (Running on oeis4.)