A005125 - OEIS

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A005125

Numbers k such that 8k - 3 is prime.

2

1, 2, 4, 5, 7, 8, 13, 14, 19, 20, 22, 23, 25, 29, 34, 35, 37, 40, 44, 47, 49, 50, 53, 58, 64, 68, 70, 77, 82, 83, 85, 88, 89, 92, 95, 97, 100, 103, 104, 107, 110, 118, 125, 127, 128, 133, 134, 137, 139, 140, 148, 152

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OFFSET

1,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[200], PrimeQ[8# - 3]&] (* Vincenzo Librandi, Jan 07 2013 *)

PROG

(Magma) [n: n in [1..200] | IsPrime(8*n-3)]; // Vincenzo Librandi, Jan 07 2013

(PARI) is(n)=isprime(8*n-3) \\ Charles R Greathouse IV, May 22 2017

CROSSREFS

Sequence in context: A330708 A107899 A032924 * A232832 A272195 A082672

Adjacent sequences: A005122 A005123 A005124 * A005126 A005127 A005128

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved