A201793 Primes of the form 7n^2 - 1.

251, 2267, 6299, 12347, 16127, 20411, 30491, 49391, 81647, 90971, 100799, 121967, 170351, 183707, 197567, 211931, 226799, 242171, 344987, 363887, 383291, 444527, 465947, 510299, 580607, 605051, 681407, 790271, 847727, 907199

Offset

1,1

Links

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

Mathematica

Select[Table[7n^2-1, {n, 1, 1000}], PrimeQ]

Prog

(Magma) [a: n in [1..400] | IsPrime(a) where a is 7*n^2-1];

Crossrefs

Sequence in context: A099734 A054800 A033451 * A183840 A340636 A234929

Adjacent sequences: A201790 A201791 A201792 * A201794 A201795 A201796

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 06 2011

Status

approved