E.g.f. A(x) satisfies A(x) = real( 1 + x*A(x)^(2*i) ), where i^2 = -1.

A380556

E.g.f. A(x) satisfies A(x) = real( 1 + x*A(x)^(2*i) ), where i^2 = -1.

Terms

    a(0) =1a(1) =1a(2) =0a(3) =-12a(4) =48a(5) =820a(6) =-14160a(7) =-69160a(8) =5900160a(9) =-44796960a(10) =-3089865600a(11) =88646729600

External references