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A176783 Primes of the form 13*n^2+3*n+1 1
17, 59, 127, 487, 659, 857, 1607, 2237, 2591, 2971, 4751, 5261, 6359, 6947, 7561, 8867, 15131, 17909, 19891, 20921, 21977, 23059, 25301, 27647, 28859, 30097, 33967, 36677, 42409, 50159, 51787, 53441, 56827, 60317, 69497, 71411, 73351, 81371 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
If negative n are also admitted, the sequence changes to 11, 17, 47, 59, 109, 127, 197, 311,... [From R. J. Mathar, May 02 2010]
LINKS
MATHEMATICA
Select[Table[13*n^2+3*n+1, {n, 0, 300}], PrimeQ] (* Vincenzo Librandi, Jul 26 2012 *)
PROG
(Magma) [ a: n in [0..250] | IsPrime(a) where a is 13*n^2+3*n+1 ]
CROSSREFS
Cf. A155152 (Numbers n such that 2*3^n-1 is prime)
Sequence in context: A141896 A104165 A031391 * A086816 A243096 A221569
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Apr 26 2010
STATUS
approved

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Last modified May 30 16:00 EDT 2024. Contains 372968 sequences. (Running on oeis4.)