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%I #5 Mar 03 2017 04:23:19
%S 2,4,8,16,28,56,104,208,384,768,1408,2816,5184,10368,19072,38144,
%T 70144,140288,258048,516096,949248,1898496,3491840,6983680,12845056,
%U 25690112,47251456,94502912,173817856,347635712,639401984,1278803968
%N Number of subsets of {1,2,...,n} which contain no three consecutive odd numbers.
%F a(n) = A000073(floor((n+1)/2)-3) * 2^(floor(n/2)).
%K easy,nonn
%O 1,1
%A _FUNG Cheok Yin_, Mar 27 2007
%E Offset corrected by _Joerg Arndt_, Mar 03 2017
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