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A076354
Numbers n such that 210*n-1 is prime.
1
2, 4, 5, 6, 9, 10, 11, 13, 14, 16, 18, 19, 21, 24, 27, 28, 29, 30, 32, 35, 36, 41, 42, 43, 44, 48, 49, 50, 51, 55, 57, 61, 63, 65, 66, 69, 70, 73, 75, 76, 86, 87, 90, 92, 94, 95, 97, 99, 102, 104, 106, 107, 108, 110, 116, 119, 121, 125, 126, 127, 128, 130, 131, 135
OFFSET
1,1
LINKS
EXAMPLE
n=2: 210*2-1=419 is prime.
MATHEMATICA
Select[Range[300], PrimeQ[210*# - 1] &] (* Vincenzo Librandi, Oct 04 2012 *)
PROG
(Magma) [n: n in [0..150]| IsPrime(210*n - 1)]; // Vincenzo Librandi, Oct 04 2012
(PARI) is(n)=isprime(210*n-1) \\ Charles R Greathouse IV, Jun 12 2017
CROSSREFS
Sequence in context: A153218 A063656 A206907 * A361936 A069470 A376423
KEYWORD
easy,nonn
AUTHOR
Zak Seidov, Oct 08 2002
STATUS
approved