E.g.f.: Product_{k>=1} (1 + x^k)^(sin(x)/k).

Terms

a(0) =1a(1) =0a(2) =2a(3) =0a(4) =24a(5) =-30a(6) =694a(7) =-1050a(8) =37832a(9) =-167076a(10) =3840946a(11) =-16352820a(12) =484077316a(13) =-3571377810a(14) =92305923462a(15) =-735565382370