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%I #4 Mar 31 2012 13:20:07
%S 2,7,23,76,255,869,3003,10504,37128,132430,476102,1723528,6277505,
%T 22988385,84592275,312636240,1159979700,4319218530,16134883410,
%U 60452176200,227110782990,855361970034,3228982640478
%N Third column of triangle A067323.
%C Also third diagonal of triangle A028364.
%F a(n)= A067323(n+2, 2)= C(n+3)-(C(n+2)+C(n+1)), C(n) := A000108(n) (Catalan).
%F G.f.: (c(x)^3)*(1+c(x)), with c(x) g.f. of A000108 (Catalan).
%Y Cf. A000245 (second column).
%K nonn,easy
%O 0,1
%A _Wolfdieter Lang_, Feb 05 2002
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