Expansion of exp(3*x)*cosh(3*x).

Terms

a(0) =1a(1) =3a(2) =18a(3) =108a(4) =648a(5) =3888a(6) =23328a(7) =139968a(8) =839808a(9) =5038848a(10) =30233088a(11) =181398528a(12) =1088391168a(13) =6530347008a(14) =39182082048a(15) =235092492288