! pipedum_19j.scl ! 21/20, 3136/3125, 2401/2400, Gene Ward Smith, 2002 19 ! 50/49 35/32 28/25 8/7 49/40 5/4 125/98 343/250 7/5 10/7 500/343 196/125 8/5 80/49 7/4 25/14 64/35 49/25 2/1