Graphs on 6 vertices
#edges
Connected graphs
All graphs
0
0
1
1
0
1
2
0
2
3
0
5
4
0
9
5
6
15
6
13
21
7
19
24
8
22
24
9
20
21
10
14
15
11
9
9
12
5
5
13
2
2
14
1
1
15
1
1
Total
112
156
Gordon Royle, July 1996, gordon@cs.uwa.edu.au