A201706 Primes of the form 9n^2 + 4.

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

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

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

Adjacent sequences: A201703 A201704 A201705 * A201707 A201708 A201709

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 04 2011

Status

approved