Expansion of e.g.f. arcsin(x)^2/(2*(1 - x)).

Terms

a(0) =0a(1) =0a(2) =1a(3) =3a(4) =16a(5) =80a(6) =544a(7) =3808a(8) =32768a(9) =294912a(10) =3096576a(11) =34062336a(12) =423493632a(13) =5505417216a(14) =79199207424