Expansion of exp(2x)+exp(x)BesselI_0(2x).

Terms

a(0) =1a(1) =3a(2) =7a(3) =15a(4) =35a(5) =83a(6) =205a(7) =521a(8) =1363a(9) =3651a(10) =9977a(11) =27701a(12) =77885a(13) =221133a(14) =632611a(15) =1820375a(16) =5262163a(17) =15266003a(18) =44414953a(19) =129521141a(20) =378427945a(21) =1107447881a(22) =3245329831a(23) =9521616731a(24) =27965113597a(25) =82210390733a(26) =241880335015