a(0)=1, a(1)=5, a(n) = 10*a(n-1) - 5*a(n-2) for n > 1.

A165225

a(0)=1, a(1)=5, a(n) = 10*a(n-1) - 5*a(n-2) for n > 1.

Terms

    a(0) =1a(1) =5a(2) =45a(3) =425a(4) =4025a(5) =38125a(6) =361125a(7) =3420625a(8) =32400625a(9) =306903125a(10) =2907028125a(11) =27535765625a(12) =260822515625

External references