PROG
(MAGMAMagma) [a: n in [0..200] | IsPrime(a) where a is 2*n^3+1]
The OEIS is supported by the many generous donors to the OEIS Foundation.
Revision History for A201107
(Bold, blue-underlined text is an addition; faded, red-underlined text is aShowing entries 1-10 | older changes
LINKS
Michael S. Branicky, <a href="/A201107/b201107_1.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..3000 from Vincenzo Librandi)
STATUS
reviewed
approved
STATUS
proposed
reviewed
STATUS
editing
proposed
NAME
Primes of the form 2n2k^3+1.
DATA
3, 17, 251, 433, 1459, 2663, 3457, 16001, 18523, 35153, 39367, 48779, 54001, 65537, 85751, 170369, 370387, 410759, 432001, 715823, 746497, 913067, 1272113, 1557377, 1714751, 1769473, 1940599, 2450087, 2735263, 3456001, 4812209, 5488001, 6615899, 6750001
LINKS
Vincenzo Librandi, Michael S. Branicky, <a href="/A201107/b201107_1.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..3000</a> from Vincenzo Librandi)
PROG
(Python)
from sympy import isprime
print(list(filter(isprime, (2*k**3+1 for k in range(152))))) # Michael S. Branicky, Jun 17 2021
STATUS
approved
editing
STATUS
editing
approved
FORMULA
a(n) = 2*A168550(n)^3+1. - R. J. Mathar, Aug 20 2019
STATUS
approved
editing
STATUS
proposed
approved
STATUS
editing
proposed