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A123429
Number of K_4-free Berge perfect graphs on n nodes.
0
1, 2, 4, 10, 28, 112, 568, 4184, 42450, 576926, 10009664, 215100466
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
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.
F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 2e383f3
CROSSREFS
Sequence in context: A374174 A022492 A352068 * A207018 A006841 A003223
Adjacent sequences: A123426 A123427 A123428 * A123430 A123431 A123432
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Oct 18 2006
EXTENSIONS
a(11) and a(12) added using tinygraph by Falk Hüffner, Jan 16 2016
STATUS
approved

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Last modified November 22 23:08 EST 2024. Contains 378031 sequences.
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