Expansion of e.g.f.: exp(tanh(x)).x.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =-4a(5) =-35a(6) =-18a(7) =679a(8) =2200a(9) =-18567a(10) =-150150a(11) =587499a(12) =11618004a(13) =-9780459a(14) =-1078005082a(15) =-2502478065a(16) =118928710576a(17) =742659420913