FUNCTION f(n)
   IF n=1 THEN
      LET f=1
   ELSEIF n=2 THEN
      LET f=(1+SQR(5))/2
   ELSE
      LET f=f(n-1)+f(n-2)
   END IF
END FUNCTION

FOR k=1 TO 20
   PRINT USING "###":k;
   PRINT ": ";
   PRINT USING "####.##########":f(k)
NEXT k
PRINT
END