%I #4 Mar 30 2012 16:48:46
%S 1,1,2,3,5,8,15,26,47,86,158,293,548,1024,1928,3643,6899,13108,24970,
%T 47663,91181,174768,335546,645278,1242767,2396746,4628198,8947868,
%U 17318417,33554432,65075294,126322568,245426708
%N A000016 / 2.
%Y A063776(n) / 4, n>2.
%K nonn
%O 3,3
%A _N. J. A. Sloane_, Apr 10 2000