A087915 Even numbers k such that 2*k+3 is a prime.

0, 2, 4, 8, 10, 14, 20, 22, 28, 32, 34, 38, 40, 50, 52, 62, 64, 68, 74, 80, 82, 88, 94, 98, 104, 110, 112, 118, 124, 130, 134, 140, 152, 154, 164, 172, 178, 182, 188, 190, 208, 214, 218, 220, 230, 232, 238, 242, 244, 248, 250, 260, 272, 280, 284, 292, 298, 302

Offset: 1

Author

Giovanni Teofilatto, Oct 18 2003

Keywords

• easy
• nonn

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.

Crossrefs

A subset of A067076.

Cf. A002145.

a(n) = A089193(n)-5.

Programs

Mathematica

Select[Range[0,350,2],PrimeQ[2#+3]&] (* Harvey P. Dale, Jan 12 2012 *)

Extensions

More terms from Ray Chandler, Oct 19 2003

Offset corrected by Arkadiusz Wesolowski, Aug 09 2011