a(n) = ((5 + 2*sqrt(2))*(5 + sqrt(2))^n + (5 - 2*sqrt(2))*(5 - sqrt(2))^n)/2.
A163611
a(n) = ((5 + 2*sqrt(2))*(5 + sqrt(2))^n + (5 - 2*sqrt(2))*(5 - sqrt(2))^n)/2.
Terms
- a(0) =5a(1) =29a(2) =175a(3) =1083a(4) =6805a(5) =43141a(6) =274895a(7) =1756707a(8) =11244485a(9) =72040589a(10) =461782735a(11) =2960893803a(12) =18987935125a(13) =121778793781a(14) =781065429935
External references
- oeis: A163611