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A145249
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1/7 of the number of 7-colorings of an n X n array symmetric about both diagonal and antidiagonal.
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0
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1, 6, 216, 6696, 1245456, 199480536, 191701832976, 158639476631256, 787680249489983376, 3367812575622948013656, 86397178658197671895582656
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OFFSET
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1,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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