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!)
A201706 Primes of the form 9n^2 + 4. 1

%I

%S 13,229,733,1093,2029,3253,7573,13693,18229,21613,31333,33493,42853,

%T 59053,65029,71293,91813,127453,140629,178933,189229,199813,205213,

%U 227533,233293,245029,257053,328333,378229,439573,514093,567013

%N Primes of the form 9n^2 + 4.

%H Vincenzo Librandi, <a href="/A201706/b201706.txt">Table of n, a(n) for n = 1..5000</a>

%t Select[Table[9n^2+4,{n,0,1000}],PrimeQ]

%o (MAGMA) [a: n in [0..300] | IsPrime(a) where a is 9*n^2+4];

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_, Dec 04 2011

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 August 1 17:21 EDT 2021. Contains 346402 sequences. (Running on oeis4.)