a(1)=5, a(2)=3, a(n)=5*a(n-1) + 3*a(n-2).

Terms

a(0) =5a(1) =3a(2) =30a(3) =159a(4) =885a(5) =4902a(6) =27165a(7) =150531a(8) =834150a(9) =4622343a(10) =25614165a(11) =141937854a(12) =786531765a(13) =4358472387a(14) =24151957230a(15) =133835203311a(16) =741631888245