Expansion of e.g.f. 1/(1 - sinh(x))^3.

Terms

a(0) =1a(1) =3a(2) =12a(3) =63a(4) =408a(5) =3123a(6) =27552a(7) =275103a(8) =3065088a(9) =37682883a(10) =506606592a(11) =7392091743a(12) =116329479168