1,3
Table of n, a(n) for n=1..6.
Eric Weisstein's World of Mathematics, Graph Cycle
Eric Weisstein's World of Mathematics, Rook Graph
Main diagonal of A286418.
Cf. A269561, A096970.
Sequence in context: A290181 A282792 A008694 * A292197 A083972 A045275
Adjacent sequences: A234621 A234622 A234623 * A234625 A234626 A234627
nonn,more
Eric W. Weisstein, Dec 28 2013
a(6) from Andrew Howroyd, May 08 2017
approved