n-th derivative of cosh(x)^sinh(x) at x=0.

Terms

a(0) =1a(1) =0a(2) =0a(3) =3a(4) =0a(5) =0a(6) =90a(7) =63a(8) =0a(9) =6240a(10) =22680a(11) =49203a(12) =376200a(13) =7076160a(14) =60540480a(15) =-57346377a(16) =39312000a(17) =49503504960a(18) =276296898240