A068291 1/17 the number of colorings of an n X n staggered hexagonal array with 17 colors.

1, 3600, 2562894000, 360815358806334000, 10045362602062958738692122000, 55306025603886596990726445398427484458000, 60215114062840644498765447997163170597224027734057082000, 12964769707834768710147648104687020983960635308403660120749080257740506000

Offset: 1

Author

R. H. Hardin, Feb 24 2002

Keywords

• nonn

Comments

Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4.

Crossrefs

Cf. A068239-A068305, A000332, A002417, A027441, A212194, A212195.

Extensions

a(5)-a(8) from Alois P. Heinz, May 03 2012