a(n) = (a(n-1)*a(n-2) + a(n-1)^2)/a(n-3), with a(1) = a(2) = a(3) = 1.

A141609

a(n) = (a(n-1)*a(n-2) + a(n-1)^2)/a(n-3), with a(1) = a(2) = a(3) = 1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =6a(5) =48a(6) =1296a(7) =290304a(8) =1763596800

External references