0,5
F. Harary and E. M. Palmer, Graphical Enumeration, Academic Press, NY, 1973, p. 228.
Sequence in context: A074551 A135074 A074540 this_sequence A141003 A002404 A097142
Adjacent sequences: A039748 A039749 A039750 this_sequence A039752 A039753 A039754
nonn,nice,more
N. J. A. Sloane (njas(AT)research.att.com).
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