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A147297 Primes of the form (2k)^2 + 3(2k + 1)^2. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..35.

PROG

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

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

CROSSREFS

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

Sequence in context: A221853 A000500 A141912 * A295975 A002225 A124335

Adjacent sequences:  A147294 A147295 A147296 * A147298 A147299 A147300

KEYWORD

nonn

AUTHOR

Kieren MacMillan, Nov 05 2008

EXTENSIONS

More terms from Vincenzo Librandi, Apr 28 2010

STATUS

approved

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Last modified December 13 23:26 EST 2018. Contains 318087 sequences. (Running on oeis4.)