The main diagonal in the table of coefficients of iterations of G(x), where G(x) = x + x*G(G(x)) = g.f. of A030266.

A141141

The main diagonal in the table of coefficients of iterations of G(x), where G(x) = x + x*G(G(x)) = g.f. of A030266.

Terms

    a(0) =1a(1) =2a(2) =12a(3) =114a(4) =1435a(5) =22219a(6) =406441a(7) =8559852a(8) =203792337a(9) =5409449156a(10) =158350300141

External references