Expansion of e.g.f. cosh(x*log(1+x)).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =12a(5) =-60a(6) =330a(7) =-2100a(8) =17024a(9) =-157248a(10) =1604520a(11) =-17875440a(12) =216589032a(13) =-2838607200a(14) =40020882720a(15) =-603994154400