declare
  type t_type is table of number index by binary_integer;
  type tt_type is table of t_type index by binary_integer;
  n        number := &n;
  tt_array tt_type;
begin

  tt_array(1)(1) := 1;
  tt_array(2)(1) := 1;
  tt_array(2)(2) := 1;

  for i in 3 .. n loop
    tt_array(i)(1) := 1;
    for j in 2 .. i - 1 loop
      tt_array(i)(j) := tt_array(i - 1) (j - 1) + tt_array(i - 1) (j);
    end loop;
    tt_array(i)(i) := 1;
  end loop;

  for i in 1 .. tt_array.count loop
    for j in 1 .. i loop
      dbms_output.put(tt_array(i) (j));
      dbms_output.put(' ');
    
    end loop;
    dbms_output.put_line('');
  end loop;

end;