1/6 the number of colorings of a 4 X 4 rhombic- or staggered- hexagonal array with n colors.

A068245

1/6 the number of colorings of a 4 X 4 rhombic- or staggered- hexagonal array with n colors.

Terms

    a(0) =1a(1) =7616a(2) =5141250a(3) =552093440a(4) =20631905875a(5) =395001645696

External references