JacobiP[n,1,3,5].

Terms

a(0) =1a(1) =14a(2) =157a(3) =1636a(4) =16505a(5) =163810a(6) =1611309a(7) =15768744a(8) =153859377a(9) =1498667990a(10) =14583950557a(11) =141854451788