a(n) = ((6 + sqrt(5))^n - (6 - sqrt(5))^n)/(2*sqrt(5)).
A153882
a(n) = ((6 + sqrt(5))^n - (6 - sqrt(5))^n)/(2*sqrt(5)).
Terms
- a(0) =1a(1) =12a(2) =113a(3) =984a(4) =8305a(5) =69156a(6) =572417a(7) =4725168a(8) =38957089a(9) =321004860a(10) =2644388561a(11) =21781512072a(12) =179402099473
External references
- oeis: A153882