A201714 Primes of the form 2n^2 - 7.

11, 43, 193, 281, 331, 443, 571, 641, 1051, 1451, 2731, 3691, 4993, 6043, 6491, 7193, 7681, 8443, 8971, 9241, 10651, 11243, 12161, 13441, 15131, 16193, 16921, 17291, 18043, 19993, 21211, 23321, 28793, 29761, 32251, 34841, 42043, 43801

Offset: 1

Author

Vincenzo Librandi, Dec 04 2011

Keywords

• nonn
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..5000

Programs

Magma

[a: n in [2..300] | IsPrime(a) where a is 2*n^2-7];

Mathematica

 Select[Table[2n^2-7,{n,2,900}],PrimeQ]