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%I #2 Mar 30 2012 18:57:04
%S 2,4,5,8,9,10,11,14,15,17,18,19,20,23,24,25,27,29,31,32,33,35,36,38,
%T 39,41,42,43,46,47,48,50,52,54,55,56,59,60,62,63,64,65,66,69,70,72,73,
%U 74,77,78,79,81,83,84,86,87,88,91,92,93,95
%N a(n)=b(3n+1), where b=A072007.
%Y Cf. A072007.
%K nonn
%O 1,1
%A _Clark Kimberling_, Jun 07 2002