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A068249
1/6 the number of colorings of a 6x6 staggered hexagonal array with n colors.
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1, 123933504, 607054532700510, 42295002762341131520, 221621606435023540827375
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.
AT&T Labs Research
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