E.g.f. satisfies: A(x) = (1+x)/(1+2*x)*A(x+x^2) with A(0)=0.

A179199

E.g.f. satisfies: A(x) = (1+x)/(1+2*x)*A(x+x^2) with A(0)=0.

Terms

    a(0) =0a(1) =1a(2) =-2a(3) =9a(4) =-64a(5) =620a(6) =-7536a(7) =109032a(8) =-1809984a(9) =33562944a(10) =-681799680a(11) =14980204800a(12) =-354016189440

External references