A201858 Primes of the form 8n^2 - 7.

193, 281, 641, 4993, 7193, 7681, 9241, 12161, 13441, 16193, 16921, 19993, 23321, 28793, 29761, 34841, 43801, 49921, 51193, 57793, 63361, 64793, 73721, 78401, 98561, 107641, 123001, 133121, 135193, 168193, 177601, 192193, 194681

Offset

1,1

Links

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

Mathematica

Select[Table[8n^2-7, {n, 1, 300}], PrimeQ]

Prog

(Magma) [a: n in [1..400] | IsPrime(a) where a is 8*n^2-7];

Crossrefs

Sequence in context: A060333 A020352 A146338 * A146360 A050964 A015988

Adjacent sequences: A201855 A201856 A201857 * A201859 A201860 A201861

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 06 2011

Status

approved