A201704 Primes of the form 8*k^2 + 7.

7, 79, 5839, 7207, 8719, 18439, 25999, 28807, 41479, 45007, 48679, 93319, 109519, 121039, 145807, 180007, 209959, 294919, 313639, 342799, 415879, 472399, 583207, 720007, 734479, 778759, 935719, 952207, 1216807, 1331719, 1391119, 1431439

Offset: 1

Author

Vincenzo Librandi, Dec 04 2011

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A121068 (corresponding k).

Programs

Magma

[a: n in [0..500] | IsPrime(a) where a is 8*n^2+7];

Mathematica

Select[Table[8n^2+7,{n,0,200}],PrimeQ]