a(n) = 2*a(n-1)^2 - a(n-2)^2 with a(0)=0, a(1)=1.
A076740
a(n) = 2*a(n-1)^2 - a(n-2)^2 with a(0)=0, a(1)=1.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =7a(4) =94a(5) =17623a(6) =621131422
External references
- oeis: A076740
A076740
a(n) = 2*a(n-1)^2 - a(n-2)^2 with a(0)=0, a(1)=1.