" <------------------------- sam052.txt ---------------------------->
" <--- Factorial --------------------------------------------------->
  n # 1 2 3 4 5
  !n
  (!n) % n
  ! 0 1 2 3 4
  f # .5 1 1.5 2 2.5
  !f
  (!f) % f
  ! -.5 0 .5 1 1.5
" <--- Binomial ---------------------------------------------------->
  0 1 2 3 ! 3
)off