E.g.f.: exp(1 / (1 - arcsinh(x)) - 1).

Terms

a(0) =1a(1) =1a(2) =3a(3) =12a(4) =61a(5) =380a(6) =2783a(7) =23240a(8) =217817a(9) =2267472a(10) =25924827a(11) =322257408a(12) =4325450325a(13) =62374428480a(14) =961296291447