a(n) = 11^n+6^n-1^n.

Terms

a(0) =1a(1) =16a(2) =156a(3) =1546a(4) =15936a(5) =168826a(6) =1818216a(7) =19767106a(8) =216038496a(9) =2368025386a(10) =25997890776a(11) =285674467666