Expansion of e.g.f. (1+x)*exp(2*x)*cosh(x).

Terms

a(0) =1a(1) =3a(2) =9a(3) =29a(4) =97a(5) =327a(6) =1097a(7) =3649a(8) =12033a(9) =39371a(10) =127945a(11) =413349a(12) =1328609a(13) =4251535a(14) =13551753a(15) =43046729a(16) =136314625a(17) =430467219a(18) =1355971721a(19) =4261625389a(20) =13366006881a(21) =41841412823a(22) =130754415049a(23) =407953774929