a(n) = ((9 + sqrt(2))^n - (9 - sqrt(2))^n)/(2*sqrt(2)).
A153593
a(n) = ((9 + sqrt(2))^n - (9 - sqrt(2))^n)/(2*sqrt(2)).
Terms
- a(0) =1a(1) =18a(2) =245a(3) =2988a(4) =34429a(5) =383670a(6) =4186169a(7) =45041112a(8) =480032665a(9) =5082340122a(10) =53559541661a(11) =562566880260
External references
- oeis: A153593