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

A068284

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

Terms

    a(0) =1a(1) =36a(2) =6588a(3) =6169500a(4) =29609340804

External references