A304125 Number of simple graphs with n vertices which contain no K5 subgraph.

1, 2, 4, 11, 33, 150, 986, 11416, 245440, 10164119, 793907916, 114150623175, 29709609171994

Offset: 1

Author

Brendan McKay, May 06 2018

Keywords

• nonn
• more

Comments

The graphs do not need to be connected.

Crossrefs

Cf. A000088, A006785 (no K3), A115196 (graphs by clique number), A304124 (no K4).

Formula

a(n) = 1+A052450(n)+A052451(n)+A052452(n).

Extensions

a(13) from Brendan McKay, May 08 2018