a(n) = ((1+sqrt(3))*(5+sqrt(3))^n + (1-sqrt(3))*(5-sqrt(3))^n)/2.
A162272
a(n) = ((1+sqrt(3))*(5+sqrt(3))^n + (1-sqrt(3))*(5-sqrt(3))^n)/2.
Terms
- a(0) =1a(1) =8a(2) =58a(3) =404a(4) =2764a(5) =18752a(6) =126712a(7) =854576a(8) =5758096a(9) =38780288a(10) =261124768a(11) =1758081344a(12) =11836068544a(13) =79682895872a(14) =536435450752
External references
- oeis: A162272