5,4
R. C. Read and R. J. Wilson, An Atlas of Graphs, Oxford, 1998.
Table of n, a(n) for n=5..15.
Cf. A006820, A033301, A033483.
Sequence in context: A082127 A031354 A200777 * A122916 A132973 A107760
Adjacent sequences: A033697 A033698 A033699 * A033701 A033702 A033703
nonn,nice
R. C. Read (rcread(AT)math.uwaterloo.ca)
approved