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A233748
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Number of colorings of the edges of the complete graph on n unlabeled vertices using at most four colors up to permutation of the colors.
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2
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1, 3, 22, 513, 67685, 37205801, 74992370359, 543437207831908, 14224090440652751128, 1355263603548588163939892, 473629305416562052216063601182, 611217587951920565260750675133929534, 2929826971690847578421964010597063713803102, 52431093582529289457516130655642218612938867242516
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OFFSET
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2,2
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REFERENCES
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Harary and Palmer, Graphical Enumeration, Chapter Six.
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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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EXTENSIONS
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STATUS
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approved
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