Expansion of e.g.f. exp(x * cosh(2*x)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =13a(4) =49a(5) =201a(6) =2161a(7) =12629a(8) =102817a(9) =1118161a(10) =9109921a(11) =105660765a(12) =1223720785a(13) =13461561881a(14) =186666204817