Expansion of e.g.f. exp(3 * x * cosh(x)).

Terms

a(0) =1a(1) =3a(2) =9a(3) =36a(4) =189a(5) =1068a(6) =6669a(7) =47568a(8) =363897a(9) =2976048a(10) =26422929a(11) =248498880a(12) =2464625205a(13) =25922981568a(14) =285884886933