a(n) = ((7 + sqrt(5))^n - (7 - sqrt(5))^n)/(2*sqrt(5)).
A153884
a(n) = ((7 + sqrt(5))^n - (7 - sqrt(5))^n)/(2*sqrt(5)).
Terms
- a(0) =1a(1) =14a(2) =152a(3) =1512a(4) =14480a(5) =136192a(6) =1269568a(7) =11781504a(8) =109080064a(9) =1008734720a(10) =9322763264a(11) =86134358016a(12) =795679428608
External references
- oeis: A153884