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A201706
Primes of the form 9n^2 + 4.
1
13, 229, 733, 1093, 2029, 3253, 7573, 13693, 18229, 21613, 31333, 33493, 42853, 59053, 65029, 71293, 91813, 127453, 140629, 178933, 189229, 199813, 205213, 227533, 233293, 245029, 257053, 328333, 378229, 439573, 514093, 567013
OFFSET
1,1
LINKS
MATHEMATICA
Select[Table[9n^2+4, {n, 0, 1000}], PrimeQ]
PROG
(Magma) [a: n in [0..300] | IsPrime(a) where a is 9*n^2+4];
CROSSREFS
Sequence in context: A218588 A158518 A223548 * A176722 A083081 A083306
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Dec 04 2011
STATUS
approved