A201705 Primes of the form 8n^2 + 9.

17, 41, 137, 401, 521, 809, 977, 1361, 2897, 3209, 3881, 4241, 5009, 5417, 6737, 9257, 12809, 13457, 15497, 16937, 17681, 22481, 25097, 26921, 33809, 39209, 42641, 47441, 49937, 57809, 61961, 63377, 89897, 100361, 102161, 123017, 135209

Offset

1,1

Links

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

Mathematica

Select[Table[8n^2+9, {n, 0, 700}], PrimeQ]

Prog

(Magma) [a: n in [0..300] | IsPrime(a) where a is 8*n^2+9];

Crossrefs

Sequence in context: A188661 A205171 A070183 * A165668 A269425 A164602

Adjacent sequences: A201702 A201703 A201704 * A201706 A201707 A201708

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 04 2011

Status

approved