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A153762 Numbers n such that 8n + 9 is prime. 6
1, 4, 8, 10, 11, 13, 16, 23, 28, 29, 31, 34, 38, 41, 43, 49, 50, 53, 55, 56, 64, 70, 71, 73, 74, 76, 79, 83, 94, 95, 100, 106, 109, 115, 116, 118, 121, 125, 128, 130, 136, 140, 143, 148, 149, 151, 155, 160, 161, 164, 169, 175, 178, 184, 185, 193, 199, 200, 206, 211 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

One less than the associated entry in A005123. - R. J. Mathar, Jan 05 2011

Solutions of the equation (8*n+9)'=1, where n' is the arithmetic derivative of n. - Paolo P. Lava, Jan 03 2013

LINKS

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

MATHEMATICA

Select[Range[0, 250], PrimeQ[8*# + 9]&] (* Vincenzo Librandi, Sep 24 2012 *)

PROG

(MAGMA) [n: n in [0..300] | IsPrime(8*n + 9)]; // Vincenzo Librandi, Sep 24 2012

(PARI) is(n)=isprime(8*n+9) \\ Charles R Greathouse IV, Sep 24 2012

CROSSREFS

Cf. A023232.

Sequence in context: A289362 A074776 A310969 * A310970 A288246 A310971

Adjacent sequences:  A153759 A153760 A153761 * A153763 A153764 A153765

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jan 01 2009

STATUS

approved

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Last modified October 18 05:07 EDT 2019. Contains 328145 sequences. (Running on oeis4.)