1,7
The smallest such graph is on 6 vertices, commonly called the "double gem."
Sequence in context: A119884 A037794 A020056 this_sequence A010913 A056660 A001541
Adjacent sequences: A086839 A086840 A086841 this_sequence A086843 A086844 A086845
nonn
Jim Nastos (nastos(AT)gmail.com), Aug 08 2003
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