! cet160.scl ! 15th root of 4, Rudolf Escher in "The Long Christmas Dinner" (1960) 15 ! 160.00000 320.00000 480.00000 640.00000 800.00000 960.00000 1120.00000 1280.00000 1440.00000 1600.00000 1760.00000 1920.00000 2080.00000 2240.00000 4/1