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A079457
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Number of unlabeled and connected graphs which are weakly chordal. (G is weakly chordal iff there are no induced cycles of size 5 or more in G nor in its complement.)
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2
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1, 1, 2, 6, 20, 103, 706, 7423, 116476, 2730992, 92711668, 4435835227
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OFFSET
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1,3
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COMMENTS
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Also known as the "weakly triangulated" graphs. Contains the chordal and cochordal graphs and is contained in the class of Perfect graphs.
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LINKS
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F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 26b03c7
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FORMULA
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Inverse Euler transform of A123472.
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CROSSREFS
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KEYWORD
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more,nonn
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AUTHOR
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EXTENSIONS
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a(10)-a(12) added using tinygraph by Falk Hüffner, Jan 15 2016
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STATUS
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approved
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