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%I #3 Mar 30 2012 18:36:46
%S 0,1,2,0,2,-10,56,-350,2390,-17544,136846,-1124794,9681832,-86864206,
%T 809349770,-7808871616,77836952362,-800020218314,8465353891808,
%U -92095165316342,1028910894313302,-11793279016419864,138555915579090830,-1667276484211383794,20533971488794963168
%N G.f. A(x) = (1+x)*G(x) = G(G(x)) where G(x) = g.f. of A067145.
%F G.f. satisfies: A(x) = (1+x)*A( A(x)/(1+x) )/(1+x + A(x)).
%Y Cf. A067145.
%K eigen,sign
%O 1,3
%A _Paul D. Hanna_, May 12 2005