Expansion of e.g.f. 1/(1 - (sin(x) + x*cos(x))/2 ).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =3a(6) =-124a(7) =-1306a(8) =-10144a(9) =-67723a(10) =-363392a(11) =-831672a(12) =16709824a(13) =386800759a(14) =5631873664a(15) =66256305994a(16) =619010054144