A052450 Number of n-node simple graphs having clique number 2.

0, 1, 2, 6, 13, 37, 106, 409, 1896, 12171, 105070, 1262179, 20797001, 467871368, 14232552451, 581460254000, 31720840164949

Offset: 1

Author

Eric W. Weisstein

Keywords

• nonn
• more

Links

• 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

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