a(n) = 6^n*Lucas(n), where Lucas = A000204.

A127213

a(n) = 6^n*Lucas(n), where Lucas = A000204.

Terms

    a(0) =6a(1) =108a(2) =864a(3) =9072a(4) =85536a(5) =839808a(6) =8118144a(7) =78941952a(8) =765904896a(9) =7437339648a(10) =72196614144a(11) =700923912192

External references