1,3
Table of n, a(n) for n=1..5.
Eric Weisstein's World of Mathematics, Hamiltonian Cycle
Eric Weisstein's World of Mathematics, Mycielski Graph
Sequence in context: A224732 A055746 A060600 * A162536 A100980 A122509
Adjacent sequences: A143244 A143245 A143246 * A143248 A143249 A143250
nonn,more
Eric W. Weisstein, Aug 01, 2008
approved