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

A365053

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

Terms

    a(0) =1a(1) =1a(2) =4a(3) =25a(4) =230a(5) =2786a(6) =42112a(7) =764296a(8) =16209916a(9) =393678856a(10) =10777609556a(11) =328466815964

External references