a(n) = ( (9 + sqrt(7))^n - (9 - sqrt(7))^n )/(2*sqrt(7)).
A154250
a(n) = ( (9 + sqrt(7))^n - (9 - sqrt(7))^n )/(2*sqrt(7)).
Terms
- a(0) =1a(1) =18a(2) =250a(3) =3168a(4) =38524a(5) =459000a(6) =5411224a(7) =63436032a(8) =741418000a(9) =8651257632a(10) =100857705376
External references
- oeis: A154250