a(n) = 9*a(n-1) + 3*a(n-2); a(0) = 0, a(1) = 1.
A181353
a(n) = 9*a(n-1) + 3*a(n-2); a(0) = 0, a(1) = 1.
Terms
- a(0) =0a(1) =1a(2) =9a(3) =84a(4) =783a(5) =7299a(6) =68040a(7) =634257a(8) =5912433a(9) =55114668a(10) =513769311a(11) =4789267803a(12) =44644718160a(13) =416170266849
External references
- oeis: A181353