A217494 - OEIS

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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A217494

Primes of the form 2*n^2 + 34*n + 15.

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];