1/5 the number of colorings of an n X n rhombic hexagonal array with 5 colors.

A068272

1/5 the number of colorings of an n X n rhombic hexagonal array with 5 colors.

Terms

    a(0) =1a(1) =36a(2) =6588a(3) =6169500a(4) =29607951492

External references