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A024898 Positive integers k such that 6k-1 is prime. 13
1, 2, 3, 4, 5, 7, 8, 9, 10, 12, 14, 15, 17, 18, 19, 22, 23, 25, 28, 29, 30, 32, 33, 38, 39, 40, 42, 43, 44, 45, 47, 49, 52, 53, 58, 59, 60, 64, 65, 67, 70, 72, 74, 75, 77, 78, 80, 82, 84, 85, 87, 93, 94, 95, 98, 99, 100, 103, 107, 108, 109, 110, 113, 114, 117, 120, 124, 127, 129, 133 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Actual primes are A007528.

LINKS

Zak Seidov and Michael De Vlieger, Table of n, a(n) for n = 1..10000 (first 3000 terms from Zak Seidov)

MATHEMATICA

Select[Range[150], PrimeQ[6 # - 1] &] (* Bruno Berselli, Jul 14 2014 *)

PROG

(MAGMA) [n: n in [0..1000]| IsPrime(6*n-1)]; // Vincenzo Librandi, Nov 20 2010

CROSSREFS

Sequence in context: A099849 A071163 A006644 * A094210 A165256 A175020

Adjacent sequences:  A024895 A024896 A024897 * A024899 A024900 A024901

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 3 04:39 EST 2016. Contains 278698 sequences.