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%I #3 Mar 30 2012 16:47:36
%S 1,2,4,9,20,44,97,212,455,961,2014,4219,8863,18662,39298,82584,173008,
%T 361321,752823,1566271,3256418,6768409,14064705,29213846,60634364,
%U 125706899,260227836,537737396,1108954613
%N Binomial transform of A003603.
%K nonn
%O 0,2
%A _N. J. A. Sloane_.