Scanf.scanf "%d" (fun n ->
    let rec gcd a b = if b = 0 then a else gcd b (a mod b) in
    let a = Array.init n (fun _ -> Scanf.scanf " %d" (fun a -> a)) in

    let rec loop_i i acc =
        let rec loop_j j acc =
            let rec loop_k k g acc =
                if k = n then acc else
                    let acc = if gcd g a.(k) = 1 then acc + 1 else acc in
                    loop_k (k + 1) g acc
            in
            if j = n then acc else loop_j (j + 1) (loop_k (j + 1) (gcd a.(i) a.(j)) acc)
        in
        if i = n then acc else loop_i (i + 1) (loop_j (i + 1) acc)
    in
    loop_i 0 0 |> Printf.printf "%d\n"
)