; spline s3 -iy i -3     ss17
       0.421666             1.3         4.41541
       0.785801             1.7         4.32287
        1.24172             2.4         3.36524
        1.91591             3.8         1.19694
        2.30418             4.8        0.571108
        2.43083             5.2        0.494753
        2.89209             7.3        0.482048
        3.02824             8.2        0.503989 ""
