%I #3 Mar 30 2012 16:49:30
%S 1,2,5,15,51,187,716,2811,11204,45089,182636,743180,3034361,12420945,
%T 50946169,209296302,860941813,3545265139,14611979639,60268977054,
%U 248744871983,1027188978686,4243751316106,17539851091965,72519657462805,299930389183429,1240806275485094
%N Result of applying the transformation on generating functions A -> 1/((1-x)*(1-x*A)) to the g.f. for A024718.
%C Equivalently, result of applying same transformation 4 times to g.f. for Catalan numbers A000108.
%F G.f.: -(4*t-1+(-4*t+1)^(1/2))/(6*t^2-5*t+(-4*t+1)^(1/2)*t+1-(-4*t+1)^(1/2)).
%Y Cf. A000108, A014137, A024718.
%K nonn
%O 0,2
%A _N. J. A. Sloane_, Aug 30 2002