%I #4 Feb 22 2013 14:39:01

%S 2,3,7,9,13,17,19,23,24,27,31,35,37,41,42,47,48,52,55,59,60,65,66,70,

%T 72,76,80,81,85,89,91,95,96,101,102,106,109,113,114,119,120,124,126,

%U 130,134,137,138,142,144,148,152

%N a(n) = 3*n + A090239(n).

%C This sequence has asymptotic density 1/3.

%K easy,nonn

%O 0,1

%A _Philippe Deléham_, Feb 05 2004