The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A176783 Primes of the form 13*n^2+3*n+1 1
 17, 59, 127, 487, 659, 857, 1607, 2237, 2591, 2971, 4751, 5261, 6359, 6947, 7561, 8867, 15131, 17909, 19891, 20921, 21977, 23059, 25301, 27647, 28859, 30097, 33967, 36677, 42409, 50159, 51787, 53441, 56827, 60317, 69497, 71411, 73351, 81371 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS If negative n are also admitted, the sequence changes to 11, 17, 47, 59, 109, 127, 197, 311,... [From R. J. Mathar, May 02 2010] LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Select[Table[13*n^2+3*n+1, {n, 0, 300}], PrimeQ] (* Vincenzo Librandi, Jul 26 2012 *) PROG (Magma) [ a: n in [0..250] | IsPrime(a) where a is 13*n^2+3*n+1 ] CROSSREFS Cf. A155152 (Numbers n such that 2*3^n-1 is prime) Sequence in context: A141896 A104165 A031391 * A086816 A243096 A221569 Adjacent sequences: A176780 A176781 A176782 * A176784 A176785 A176786 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Apr 26 2010 STATUS approved

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.

Last modified May 30 16:00 EDT 2024. Contains 372968 sequences. (Running on oeis4.)