{m : Type u_3 → Type u_2} →
  {α : Type u_3} →
    (motive : (x : ℕ) → (Fin x → m α) → Sort u_1) →
      (x : ℕ) →
        (x_1 : Fin x → m α) →
          ((x : Fin 0 → m α) → motive 0 x) → ((n : ℕ) → (f : Fin (n + 1) → m α) → motive n.succ f) → motive x x_1