**G.f. satisfies: A(x) = Catalan(x + x^2 + x^3*A(x)) where Catalan(x) = (1-sqrt(1-4*x))/(2x) is the g.f. of A000108.**

*1, 1, 3, 10, 36, 139, 560, 2328, 9914, 43027, 189619, 846267, 3817105, 17373048*

*1 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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