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%I #7 Oct 23 2019 17:32:36
%S 1,3,9,28,84,246,714,2059,5917,16971,48633,139333,399267,1144669,
%T 3283839,9427981,27090715,77911897,224272499,646157234,1863317958,
%U 5377939756,15535195892,44913790501,129955421387,376313609029
%N a(n) = A027082(n, 2n-3).
%K nonn
%O 2,2
%A _Clark Kimberling_