a(n) = a(n-1) * a(n-2) - 1.A055937a(n) = a(n-1) * a(n-2) - 1.Terms a(0) =2a(1) =2a(2) =3a(3) =5a(4) =14a(5) =69a(6) =965a(7) =66584a(8) =64253559External referencesoeis: A055937