E.g.f. satisfies A(x) = ( 1 + (exp(x*A(x)) - 1)/A(x) )^2.

A377339

E.g.f. satisfies A(x) = ( 1 + (exp(x*A(x)) - 1)/A(x) )^2.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =20a(4) =144a(5) =1332a(6) =15920a(7) =225332a(8) =3758272a(9) =71711540a(10) =1544139216a(11) =37040248500a(12) =979378764320

External references