A145688 Primitive prime factors of the sequence 2k^2 + 1 in the order that they are found.

3, 19, 11, 17, 73, 43, 163, 67, 113, 131, 41, 193, 59, 241, 89, 883, 353, 1153, 139, 1459, 523, 1801, 641, 683, 2179, 257, 2593, 83, 107, 179, 97, 3529, 137, 1291, 4051, 491, 419, 1601, 1667, 601, 1873, 307, 2017, 2243, 211, 379, 827, 233, 467, 2731, 313, 8713

Offset: 1

Author

Bernhard Helmes (pi(AT)devalco.de), Oct 16 2008

Keywords

• nonn

Comments

a(n) mod 8 = 1 or 3.

Links

• Bernhard Helmes, Prime sieving on the polynomial f(n)=2n^2+1.

Crossrefs

Cf. A144851.