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%I #6 Sep 07 2019 22:03:31
%S 1,2,8,40,211,1148,6369,35816,203424,1164228,6703372,38785840,
%T 225325940,1313494396,7679038865,45006411960,264357297375,
%U 1555762562100,9171399730944,54148782940112,320136500713070,1895036382245032,11230166960501463,66619011999761208,395563260817743219
%N a(n) = T(2n,n), where T is the array defined in A025564.
%K nonn
%O 1,2
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Sep 07 2019