Expansion of e.g.f.: sech(sin(x)*log(x+1)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =-12a(5) =60a(6) =-210a(7) =1260a(8) =-1680a(9) =-66528a(10) =854040a(11) =-9944880a(12) =101761704a(13) =-561845856a(14) =-2175945408a(15) =136635189600