a(n) = 2*a(n-1)^2 - 2*a(n-2)^2 with a(0) = 0, a(1) = 1.
A061999
a(n) = 2*a(n-1)^2 - 2*a(n-2)^2 with a(0) = 0, a(1) = 1.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =6a(4) =64a(5) =8120a(6) =131860608
External references
- oeis: A061999
A061999
a(n) = 2*a(n-1)^2 - 2*a(n-2)^2 with a(0) = 0, a(1) = 1.