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A198634
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Number of weakly perfect graphs on n nodes.
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4
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1, 2, 4, 11, 33, 152, 1006, 11805, 257542, 11011758, 917095022, 145164791300
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OFFSET
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1,2
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COMMENTS
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A graph is weakly perfect if it has equal chromatic and clique numbers.
First differs from A287007 (fractional chromatic number equals chromatic number) at a(8). - Eric W. Weisstein, May 17 2017
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LINKS
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F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 4361e42
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FORMULA
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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