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

A389818

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

Terms

    a(0) =1a(1) =1a(2) =2a(3) =18a(4) =108a(5) =1020a(6) =12720a(7) =169680a(8) =2770320a(9) =51423120a(10) =1058279040a(11) =24441056640a(12) =618994474560

External references