A068277 1/10 the number of colorings of an n X n rhombic hexagonal array with 10 colors.

1, 576, 16777728, 24714188421120, 1841036262836198694912, 6935553325507306088696846155776, 1321303757030716925589852391986906706673664, 12729959052897370321435414735439044407648771577838567424

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, A212162, A212163.

Extensions

a(6)-a(8) from Alois P. Heinz, May 02 2012