A068278 1/11 the number of colorings of an n X n rhombic hexagonal array with 11 colors.

1, 810, 43047450, 150104969072730, 34342194186546625610730, 515520974797472540384088260118570, 507750044609844563320250272016778947097815370, 32812470510724769634930013386228840033573943730279978702970

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..8.

Crossrefs

Cf. A068239-A068305, A000332, A002417, A027441, A212162, A212163.

Sequence in context: A156404 A282376 A203844 * A208189 A183216 A093633

Adjacent sequences: A068275 A068276 A068277 * A068279 A068280 A068281

Keyword

nonn

Author

R. H. Hardin, Feb 24 2002

Extensions

a(5)-a(8) from Alois P. Heinz, May 02 2012

Status

approved