simple
  1 ==> 3
  2 ==> 6
  3 ==> 11
  4 ==> 18
  7 ==> 51
fibo
  1 ==> 1
  2 ==> 2
  3 ==> 3
  4 ==> 5
  7 ==> 21
run_script
hello from called script
9
too many/few arguments
2
102