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%I #4 Feb 22 2013 14:39:00
%S 0,4,8,10,14,15,20,21,25,28,32,33,38,39,43,45,49,53,56,57,61,63,67,71,
%T 73,77,78,82,86,87,92,93,97,99,103,107,110,111,115,117,121,125,127,
%U 131,132,135,139,143,145,149,150
%N a(n) = 3*n + A053838(n).
%C This sequence has asymptotic density 1/3.
%K easy,nonn
%O 0,2
%A _Philippe Deléham_, Feb 05 2004
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