a(n) = ((10-sqrt(10))^n + (10+sqrt(10))^n) / 2.
A289414
a(n) = ((10-sqrt(10))^n + (10+sqrt(10))^n) / 2.
Terms
- a(0) =1a(1) =10a(2) =110a(3) =1300a(4) =16100a(5) =205000a(6) =2651000a(7) =34570000a(8) =452810000a(9) =5944900000a(10) =78145100000
External references
- oeis: A289414