A068285 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A068285

1/6 the number of colorings of an n X n staggered hexagonal array with 6 colors.

1, 80, 65600, 552093440, 47695073906240, 42295002762341131520, 384997602083152626170331200, 35973286295593063089098993201626880, 34502872879799250159432202960093141227521600

(list; graph; refs; listen; history; text; internal format)

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..9.

CROSSREFS

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

Sequence in context: A159377 A183582 A068273 * A159408 A159391 A323448

Adjacent sequences: A068282 A068283 A068284 * A068286 A068287 A068288

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 24 2002

EXTENSIONS

a(7)-a(9) from Alois P. Heinz, May 03 2012

STATUS

approved