a(n) = 5*a(n-1) - 5*a(n-2) for n>1, a(0)=2, a(1)=3.

Terms

a(0) =2a(1) =3a(2) =5a(3) =10a(4) =25a(5) =75a(6) =250a(7) =875a(8) =3125a(9) =11250a(10) =40625a(11) =146875a(12) =531250a(13) =1921875a(14) =6953125a(15) =25156250a(16) =91015625a(17) =329296875a(18) =1191406250a(19) =4310546875a(20) =15595703125a(21) =56425781250a(22) =204150390625a(23) =738623046875