%I #2 Mar 30 2012 17:34:01
%S 0,0,2,2,6,6,10,14,22,26
%N a(n) = A161828(n)*2/3.
%Y Cf. A160120, A161828, A161829, A161834.
%K more,nonn
%O 0,3
%A _Omar E. Pol_, Jul 17 2009
