A088879 Numbers n such that 3n + 5 is a prime.

-1, 0, 2, 4, 6, 8, 12, 14, 16, 18, 22, 26, 28, 32, 34, 36, 42, 44, 48, 54, 56, 58, 62, 64, 74, 76, 78, 82, 84, 86, 88, 92, 96, 102, 104, 114, 116, 118, 126, 128, 132, 138, 142, 146, 148, 152, 154, 158, 162, 166, 168, 172, 184, 186, 188, 194, 196, 198, 204, 212, 214, 216, 218

Offset

1,3

References

M. Cerasoli, F. Eugeni and M. Protasi, Elementi di Matematica Discreta, Bologna 1988

Emanuele Munarini and Norma Zagaglia Salvi, Matematica Discreta, UTET, CittaStudiEdizioni, Milano 1997

Links

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

Formula

a(n) = A024893(n) - 1 = A087370(n) - 2.

Mathematica

lst={}; Do[p=n+(n+2)+(n+3); If[PrimeQ[p], AppendTo[lst, n]], {n, 0, 5!}]; lst (* Vladimir Joseph Stephan Orlovsky, May 22 2009 *)
Select[Range[-1, 300], PrimeQ[3#+5]&] (* Harvey P. Dale, Jun 08 2020 *)

Crossrefs

A003627 gives primes, A091177 gives prime index.

Cf. A016789.

Sequence in context: A328593 A254748 A217562 * A316470 A290822 A318186

Adjacent sequences: A088876 A088877 A088878 * A088880 A088881 A088882

Keyword

easy,sign

Author

Giovanni Teofilatto, Nov 27 2003

Extensions

Edited and extended by Ray Chandler, Dec 26 2003

Status

approved