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

A390013

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

Terms

    a(0) =1a(1) =1a(2) =3a(3) =10a(4) =53a(5) =336a(6) =2887a(7) =30304a(8) =395817a(9) =6102784a(10) =109219211a(11) =2206139904a(12) =49543830877

External references