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A068249
1/6 the number of colorings of a 6 X 6 staggered hexagonal array with n colors.
2
1, 123933504, 607054532700510, 42295002762341131520, 221621606435023540827375, 227499908955471802467974016, 76749558468512064584917217484, 11559255724071428199019433809920, 945121792213234612017996840421965, 47886238153764555711259823337784000
OFFSET
3,2
LINKS
Alois P. Heinz, Formula for A068249
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2002
EXTENSIONS
Extended beyond a(7) by Alois P. Heinz, May 03 2012
STATUS
approved