Expansion of e.g.f. arctan(sinh(x) * exp(x)).

Terms

a(0) =0a(1) =1a(2) =2a(3) =2a(4) =-16a(5) =-160a(6) =-688a(7) =3152a(8) =99584a(9) =992000a(10) =31232a(11) =-190094848a(12) =-3600265216a(13) =-20655831040a(14) =737829988352