1,4
Table of n, a(n) for n=1..5.
Eric Weisstein's World of Mathematics, Graph Cycle
Eric Weisstein's World of Mathematics, Mycielski Graph
Sequence in context: A194478 A084231 A243483 * A226539 A066478 A261707
Adjacent sequences: A234622 A234623 A234624 * A234626 A234627 A234628
nonn
Eric W. Weisstein, Dec 28 2013
approved