A234628 Numbers of undirected cycles in the graph join C_n + C_n of cycle graphs.

11, 197, 2766, 60142, 1921115, 84779781, 4939361970, 367260392738, 33943163219867

Offset

2,1

Links

Table of n, a(n) for n=2..10.

Eric Weisstein's World of Mathematics, Graph Cycle

Eric Weisstein's World of Mathematics, Graph Join

Crossrefs

Sequence in context: A218818 A243646 A186251 * A105124 A272500 A034831

Adjacent sequences: A234625 A234626 A234627 * A234629 A234630 A234631

Keyword

nonn,more

Author

Eric W. Weisstein, Dec 28 2013

Extensions

Name corrected by Eric W. Weisstein, Mar 09 2016

Status

approved