A147297 Primes of the form (2k)^2 + 3(2k + 1)^2.

31, 307, 463, 1123, 1723, 3307, 4831, 6007, 8011, 10303, 11131, 13807, 20023, 23563, 26083, 30103, 35911, 43891, 60271, 86143, 95791, 108571, 127807, 136531, 145543, 164431, 205663, 239611, 276151, 284623, 288907, 366631, 371491, 386263, 459007

Offset: 1

Author

Kieren MacMillan, Nov 05 2008

Keywords

• nonn

Crossrefs

First thirteen terms are a subset of A073337, A002383 and A085104.

Programs

Magma

[ a: n in [1..900] | IsPrime(a) where a is (2*n)^2 + 3*(2*n+1)^2] // Vincenzo Librandi, Nov 25 2010

Maxima

makelist((2*k)^2+3*(2*k+1)^2,k,1,100)$ sublist(%,primep);

Extensions

More terms from Vincenzo Librandi, Apr 28 2010