Calculate fibonacci sequence using recursive CTE

gistfile1.sql

with recursive fibo(ord, m, n) as (
 values (1, 1, 1)
 union all
 select ord+1, n, m+n from fibo where ord < 10
) select m from fibo;
/* result :
 m
----
  1
  1
  2
  3
  5
  8
 13
 21
 34
 55
(10 rows)
*/