Expansion of e.g.f. 1/(1 - x^3 - x^4)^x.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =24a(5) =120a(6) =0a(7) =2520a(8) =60480a(9) =544320a(10) =3024000a(11) =59875200a(12) =1277337600a(13) =16086470400a(14) =214313299200