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A123472
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Number of weakly triangulated perfect graphs on n nodes.
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1
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1, 2, 4, 11, 33, 146, 886, 8483, 126029, 2866876, 95717334, 4534590984
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..12.
S. Hougardy, Home Page
S. Hougardy, Classes of perfect graphs, Discr. Math. 306 (2006), 2529-2571.
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FORMULA
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Euler transform of A079457. - Falk Hüffner, Jan 15 2016
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CROSSREFS
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Sequence in context: A123437 A123435 A123409 * A277203 A123905 A123442
Adjacent sequences: A123469 A123470 A123471 * A123473 A123474 A123475
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KEYWORD
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nonn,more
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AUTHOR
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N. J. A. Sloane, Oct 18 2006
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EXTENSIONS
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a(10) and a(11) added using formula by Falk Hüffner, Jan 15 2016
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STATUS
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approved
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