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A319114
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Number of simple toroidal graphs on n nodes.
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0
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OFFSET
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1,6
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COMMENTS
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a(8) = A145269(8) - 15 since there are 15 double-toroidal graphs on 8 nodes (all of which are connected).
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LINKS
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CROSSREFS
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Cf. A145269 (number of nonplanar simple graphs).
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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