E.g.f.: Expansion of cosh(sinh(x)*log(1+x)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =12a(5) =-60a(6) =450a(7) =-2940a(8) =24080a(9) =-215712a(10) =2245320a(11) =-25552560a(12) =318861576a(13) =-4280157024a(14) =61675886272a(15) =-948295464480