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T(2n,n-1), T given by A026659.
0

%I #4 Mar 30 2012 18:56:09

%S 1,5,20,87,358,1533,6445,27555,117529,503001,2167209,9289047,40320051,

%T 173069913,755481768,3247042719,14236984102,61259521341,269560841080,

%U 1161017915091,5123885956516,22087793150253,97719510829418

%N T(2n,n-1), T given by A026659.

%K nonn

%O 1,2

%A _Clark Kimberling_