A146538 Even numbers n such that n+3 is not a prime.

6, 12, 18, 22, 24, 30, 32, 36, 42, 46, 48, 52, 54, 60, 62, 66, 72, 74, 78, 82, 84, 88, 90, 92, 96, 102, 108, 112, 114, 116, 118, 120, 122, 126, 130, 132, 138, 140, 142, 144, 150, 152, 156, 158, 162, 166, 168, 172, 174, 180, 182, 184, 186, 192, 198, 200, 202, 204, 206

Offset: 1

Author

Giovanni Teofilatto, Oct 31 2008

Keywords

• easy
• nonn

Crossrefs

Cf. A086801.

Programs

Mathematica

Select[2*Range[150],!PrimeQ[#+3]&] (* Harvey P. Dale, Oct 15 2012 *)

Extensions

54 and 66 inserted, 7274 split, 78 inserted, 176 removed by R. J. Mathar, Dec 04 2008