a(n) = 4*a(n-1)*a(n-2)*a(n-3) - a(n-4) with a(1) = a(2) = a(3) = a(4) = 1.
A072878
a(n) = 4*a(n-1)*a(n-2)*a(n-3) - a(n-4) with a(1) = a(2) = a(3) = a(4) = 1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =11a(6) =131a(7) =17291a(8) =99665321
External references
- oeis: A072878