a(n) = 2*a(n-1)*(a(n-1)-1) for n > 1, with a(0) = 1, a(1) = 2.

A001510

a(n) = 2*a(n-1)*(a(n-1)-1) for n > 1, with a(0) = 1, a(1) = 2.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =24a(4) =1104a(5) =2435424

External references