E.g.f.: exp(x)/sqrt(1-4*x).

A052143

E.g.f.: exp(x)/sqrt(1-4*x).

Terms

    a(0) =1a(1) =3a(2) =17a(3) =163a(4) =2241a(5) =39971a(6) =874513a(7) =22652547a(8) =677742593a(9) =22996109251a(10) =872449527441

External references