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

Terms

a(0) =0a(1) =1a(2) =4a(3) =15a(4) =56a(5) =205a(6) =732a(7) =2555a(8) =8752a(9) =29529a(10) =98420a(11) =324775a(12) =1062888a(13) =3454373a(14) =11160268a(15) =35872275a(16) =114791264a(17) =365897137a(18) =1162261476a(19) =3680494655a(20) =11622614680a(21) =36611236221a(22) =115063885244a(23) =360882185515