a(n) = 6*a(n-1) - 3*a(n-2) for n > 1; a(0) = 1, a(1) = 7.
A164550
a(n) = 6*a(n-1) - 3*a(n-2) for n > 1; a(0) = 1, a(1) = 7.
Terms
- a(0) =1a(1) =7a(2) =39a(3) =213a(4) =1161a(5) =6327a(6) =34479a(7) =187893a(8) =1023921a(9) =5579847a(10) =30407319a(11) =165704373a(12) =903004281a(13) =4920912567a(14) =26816462559a(15) =146136037653a(16) =796366838241
External references
- oeis: A164550