The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A155152 Numbers n such that 13n^2+3n+1 is prime. 3
 1, 2, 3, 6, 7, 8, 11, 13, 14, 15, 19, 20, 22, 23, 24, 26, 34, 37, 39, 40, 41, 42, 44, 46, 47, 48, 51, 53, 57, 62, 63, 64, 66, 68, 73, 74, 75, 79, 88, 91, 94, 96, 97, 99, 102, 107, 111, 112, 116, 122, 133, 135, 144, 146, 152, 161, 162, 163, 165, 166, 167, 172, 180, 183, 184, 187 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Select[Range[200], PrimeQ[13#^2+3#+1]&] (* Harvey P. Dale, Dec 08 2011 *) PROG (Magma) [n: n in [0..200] | IsPrime(13*n^2+3*n+1)]; // Vincenzo Librandi, Sep 24 2012 (PARI) is(n)=isprime(13*n^2+3*n+1) \\ Charles R Greathouse IV, May 22 2017 CROSSREFS Cf. A155153. Sequence in context: A001422 A097757 A304028 * A098740 A116046 A069579 Adjacent sequences: A155149 A155150 A155151 * A155153 A155154 A155155 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Jan 21 2009 EXTENSIONS Definition corrected and terms recomputed by Jon E. Schoenfield and N. J. A. Sloane, Jun 16 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 November 30 02:32 EST 2022. Contains 358431 sequences. (Running on oeis4.)