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A005124 Numbers n such that 8n + 3 is prime. 10
0, 1, 2, 5, 7, 8, 10, 13, 16, 17, 20, 22, 26, 28, 31, 35, 38, 41, 43, 47, 52, 55, 58, 61, 62, 65, 68, 70, 71, 73, 77, 80, 82, 85, 86, 92, 98, 101, 103, 107, 110, 113, 118, 121, 127, 131, 136, 140, 145, 146, 148, 157, 160, 161, 163, 178, 181, 182, 185, 187 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Solutions of the equation (8*n+3)'=1, where n' is the arithmetic derivative of n. - Paolo P. Lava, Jan 03 2013

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

(#-3)/8&/@Select[Range[3, 1303, 8], PrimeQ] (* Harvey P. Dale, May 19 2012 *)

Select[Range[0, 300], PrimeQ[8 # + 3] &] (* Vincenzo Librandi, Jun 25 2014 *)

PROG

(MAGMA) [n: n in [0..200] | IsPrime(8*n+3)]; // Vincenzo Librandi, Jun 25 2014

(PARI) is(n)=isprime(8*n+3) \\ Charles R Greathouse IV, Feb 17 2017

CROSSREFS

Sequence in context: A047481 A158704 A131854 * A160530 A214518 A331866

Adjacent sequences:  A005121 A005122 A005123 * A005125 A005126 A005127

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Wesley Ivan Hurt, Jun 25 2014

STATUS

approved

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Last modified April 9 20:55 EDT 2020. Contains 333363 sequences. (Running on oeis4.)