a(n) = 4*a(n-1)*a(n-2)*a(n-3)*a(n-4) - a(n-5).
A121897
a(n) = 4*a(n-1)*a(n-2)*a(n-3)*a(n-4) - a(n-5).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =11a(7) =131a(8) =17291a(9) =298995971
External references
- oeis: A121897
A121897
a(n) = 4*a(n-1)*a(n-2)*a(n-3)*a(n-4) - a(n-5).