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%I #3 Mar 30 2012 18:55:59
%S 1,3,9,29,93,297,949,3195,10701,35675,118761,410949,1413385,4835421,
%T 16526241,58096283,203257713,708000147,2462308561,8753612709,
%U 30980135637,109194529241,384438181581,1376928356139,4914117411565,17478861072723
%N a(n) = s(n+3)/6, where s is A024743.
%K nonn
%O 1,2
%A _Clark Kimberling_