a(n) = ((9 + sqrt(3))^n - (9 - sqrt(3))^n)/(2*sqrt(3)).
A153600
a(n) = ((9 + sqrt(3))^n - (9 - sqrt(3))^n)/(2*sqrt(3)).
Terms
- a(0) =1a(1) =18a(2) =246a(3) =3024a(4) =35244a(5) =398520a(6) =4424328a(7) =48553344a(8) =528862608a(9) =5732366112a(10) =61931306592a(11) =667638961920
External references
- oeis: A153600