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A176709
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Number of isomorphism classes of 6-fold coverings of a connected graph with Betti number n.
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1
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1, 11, 901, 524137, 373486525, 268749463729, 193492277719861, 139314094050615817, 100306131218514392365, 72220413687258533050849, 51998697816934668649790821, 37439062426374732606941352697, 26956124946902542404909380816605, 19408409961765641983297475951692369
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OFFSET
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0,2
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REFERENCES
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J. H. Kwak and J. Lee, Enumeration of graph coverings, surface branched coverings and related group theory, in Combinatorial and Computational Mathematics (Pohang, 2000), ed. S. Hong et al., World Scientific, Singapore 2001, pp. 97-161.
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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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