3,2

R. C. Read and R. J. Wilson, An Atlas of Graphs, Oxford, 1998.

Cf. A005142.

Sequence in context: A106558 A065914 A108262 this_sequence A072687 A110561 A107991

Adjacent sequences: A034889 A034890 A034891 this_sequence A034893 A034894 A034895

nonn,nice

R. C. Read (rcread(AT)math.uwaterloo.ca)