%I A027057
%S A027057 1,2,4,9,21,51,128,329,861,2285,6132,16606,45313,124446,343680,
%T A027057 953753,2658133,7436541,20875972,58783892,165989825,469903672,
%U A027057 1333359488,3791535934,10802911297,30836181436,88169413364,252500533673
%N A027057 (1/2)*T(n,2n-1), T given by A027052.
%Y A027057 Sequence in context: A086246 A168049 A001006 this_sequence A148071 A000636 
               A136753
%Y A027057 Adjacent sequences: A027054 A027055 A027056 this_sequence A027058 A027059 
               A027060
%K A027057 nonn
%O A027057 2,2
%A A027057 Clark Kimberling (ck6(AT)evansville.edu)