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A052450 Number of n-node simple graphs having clique number 2. 11
0, 1, 2, 6, 13, 37, 106, 409, 1896, 12171, 105070, 1262179, 20797001, 467871368, 14232552451, 581460254000, 31720840164949 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
Table of n, a(n) for n=1..17.
Keith M. Briggs, Combinatorial Graph Theory
Eric Weisstein's World of Mathematics, Clique Number.
CROSSREFS
Cf. A052451, A052452, A052453, A077392, A077393, A077394.
a(n) = A006785(n) - 1. - Falk Hüffner, Nov 20 2015
Sequence in context: A026550 A319751 A124124 * A231385 A001373 A320804
Adjacent sequences: A052447 A052448 A052449 * A052451 A052452 A052453
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein
EXTENSIONS
2 more terms from Eric W. Weisstein, Nov 03 2002
a(10) from Keith Briggs, Mar 15 2006
a(11) from Michael Sollami, Jan 29 2012
a(12) from Michael Sollami, Mar 26 2012
More terms added using A006785 by Falk Hüffner, Nov 20 2015
STATUS
approved

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Last modified May 28 22:13 EDT 2024. Contains 372921 sequences. (Running on oeis4.)