A068281 1/14 the number of colorings of an n X n rhombic hexagonal array with 14 colors.

1, 1872, 429983424, 12118236294438144, 41905301129446014898200576, 17780352279236011016040115376770056192, 925664488474756221142848128240158691162017819238400, 5913011057048168843456253932545740404857450278470215562237034528768

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