Write a PL/SQL block to display following series

1 1 2 3 5 8 ..... N

DECLARE
term1 number;
term2 number;
term3 number;
n number;
BEGIN
  n:=&n;
  term1:=1;
  term2:=0;
  term3:=1;
  FOR i in 1..n
  LOOP
    dbms_output.put_line(term3||' ');
    term1:=term2;
    term2:=term3;
    term3:=term1+term2;
  END LOOP;
END;