delta=0.25 k=2: min T* +0.18126 (a=0.9) pair spacings [0.849]
delta=0.25 k=4: min T* +0.15949 (a=0.8) pair spacings [0.896 0.927 0.897]
delta=0.25 k=6: min T* +0.19859 (a=0.9) pair spacings [0.902 0.943 0.951 0.943 0.902]
