a(n) = (3-sqrt(5))*((3+sqrt(5))/10)^(-n)/2 + (3+sqrt(5))*((3-sqrt(5))/10)^(-n)/2.

A179135

a(n) = (3-sqrt(5))*((3+sqrt(5))/10)^(-n)/2 + (3+sqrt(5))*((3-sqrt(5))/10)^(-n)/2.

Terms

    a(0) =3a(1) =35a(2) =450a(3) =5875a(4) =76875a(5) =1006250a(6) =13171875a(7) =172421875a(8) =2257031250a(9) =29544921875a(10) =386748046875

External references