a(n) = 9*a(n-1) + 72*a(n-2), n > 2; a(0)=1, a(1)=1, a(2)=17.
A155001
a(n) = 9*a(n-1) + 72*a(n-2), n > 2; a(0)=1, a(1)=1, a(2)=17.
Terms
- a(0) =1a(1) =1a(2) =17a(3) =225a(4) =3249a(5) =45441a(6) =642897a(7) =9057825a(8) =127809009a(9) =1802444481a(10) =25424248977a(11) =358594243425
External references
- oeis: A155001