a(n) = ((1+4*sqrt(2))*(5+sqrt(2))^n + (1-4*sqrt(2))*(5-sqrt(2))^n)/2.
A164301
a(n) = ((1+4*sqrt(2))*(5+sqrt(2))^n + (1-4*sqrt(2))*(5-sqrt(2))^n)/2.
Terms
- a(0) =1a(1) =13a(2) =107a(3) =771a(4) =5249a(5) =34757a(6) =226843a(7) =1469019a(8) =9472801a(9) =60940573a(10) =391531307a(11) =2513679891a(12) =16131578849a(13) =103501150997a(14) =663985196443
External references
- oeis: A164301