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A024893 Numbers n such that 3*n+2 is prime. 15
0, 1, 3, 5, 7, 9, 13, 15, 17, 19, 23, 27, 29, 33, 35, 37, 43, 45, 49, 55, 57, 59, 63, 65, 75, 77, 79, 83, 85, 87, 89, 93, 97, 103, 105, 115, 117, 119, 127, 129, 133, 139, 143, 147, 149, 153, 155, 159, 163, 167, 169, 173, 185, 187, 189, 195, 197, 199, 205, 213, 215, 217, 219, 225, 227 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

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

FORMULA

a(n) = A087370(n)-1 = A088879(n)+1.

MATHEMATICA

Select[Range[0, 250], PrimeQ[3# + 2] &] (* Vincenzo Librandi, Sep 25 2012 *)

PROG

(MAGMA) [n: n in [0..1000] | IsPrime(3*n+2)]; // Vincenzo Librandi, Nov 20 2010

(PARI) is(n)=isprime(3*n+2) \\ Charles R Greathouse IV, Feb 17 2017

CROSSREFS

Cf. A003627 (associated primes), A091177 (gives prime index).

Sequence in context: A063425 A215806 A064608 * A119253 A063951 A131437

Adjacent sequences:  A024890 A024891 A024892 * A024894 A024895 A024896

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified November 18 14:15 EST 2017. Contains 294893 sequences.