The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A217494 Primes of the form 2*n^2 + 34*n + 15. 14
 631, 883, 1171, 2251, 2683, 8191, 9811, 12511, 20071, 25183, 30871, 33931, 38791, 40483, 57331, 61471, 70183, 81883, 94483, 105211, 125371, 150571, 157231, 167491, 188983, 292483, 315883, 340183, 360271, 423991, 440731, 469351, 481051, 510931 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Conjecture: 2^a(n)-1 is not prime; in other words, these primes are included in A054723. 2*a(n)+259 is a square. - Vincenzo Librandi, Mar 04 2013 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..3000 MATHEMATICA Select[Table[2 n^2 + 34 n + 15, {n, 500}], PrimeQ] PROG (MAGMA) [a: n in [1..500] | IsPrime(a) where a is 2*n^2+34*n+15]; CROSSREFS Cf. A054723, A176549. Subsequence of A002145. Sequence in context: A270802 A119504 A020387 * A105305 A252412 A002227 Adjacent sequences:  A217491 A217492 A217493 * A217495 A217496 A217497 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Oct 08 2012 STATUS approved

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.

Last modified February 28 01:43 EST 2020. Contains 332319 sequences. (Running on oeis4.)