A201483 primes of the form 5n^2 + 4.

409, 1129, 5449, 13009, 16249, 49009, 61609, 68449, 91129, 99409, 167449, 178609, 190129, 356449, 477409, 534649, 595129, 680809, 748849, 796009, 820129, 844609, 920209, 972409, 999049, 1225129, 1315849, 1378129, 1441849, 1607449

Offset

1,1

Links

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

Mathematica

Select[Table[5n^2+4, {n, 0, 2000}], PrimeQ]

Prog

(Magma) [a: n in [0..700] | IsPrime(a) where a is 5*n^2+4];

Crossrefs

Sequence in context: A260173 A321151 A052376 * A031601 A107625 A061333

Adjacent sequences: A201480 A201481 A201482 * A201484 A201485 A201486

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 02 2011

Status

approved