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A145248
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1/7 of the number of 7-colorings of an n X n array symmetric about main diagonal.
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0
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1, 36, 6696, 6434856, 31950305496, 819641876611536, 108639115329132446256, 74398000023802854152545176, 263238411131474343380724043084176, 4812272591214805875385097207664108389976
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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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