A026092 - OEIS

%I #3 Mar 30 2012 18:56:04

%S 1,1,9,45,248,1377,7756,44096,252570,1455166,8424011,48960606,

%T 285512823,1669721225,9788890230,57511916805,338536358979,

%U 1996103321754,11787262391390,69699393574522

%N a(n) = T(2n,n-1), where T is the array defined in A026082.

%K nonn

%O 1,3

%A _Clark Kimberling_