Aha!




 K = 1.000001  0.882497  0.606531  0.324652  0.135335  0.043937
     0.882497  1.000001  0.882497  0.606531  0.324652  0.135335
     0.606531  0.882497  1.000001  0.882497  0.606531  0.324652
     0.324652  0.606531  0.882497  1.000001  0.882497  0.606531
     0.135335  0.324652  0.606531  0.882497  1.000001  0.882497
     0.043937  0.135335  0.324652  0.606531  0.882497  1.000001

Looks like nonlinear regression

So, where did this 6x6 matrix come from?