A052447 Number of simple unlabeled n-node graphs of edge-connectivity 2.

0, 0, 1, 2, 8, 41, 352, 4820, 113256, 4602039, 325754696, 40348545658

Offset: 1

Author

Eric W. Weisstein, May 08 2000

Keywords

• nonn
• hard
• more

Links

• Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs
• T. Hoppe and A. Petrone, Integer sequence discovery from small graphs, arXiv preprint arXiv:1408.3644 [math.CO], 2014.
• Jens M. Schmidt, Combinatorial data.
• Eric Weisstein's World of Mathematics, k-Edge-Connected Graph.

Crossrefs

Column k=2 of A263296.

Cf. other unlabeled edge-connectivity graph sequences A052446, A052448, A241703, A241704, A241705.

Extensions

a(8)-a(10) from the Encyclopedia of Finite Graphs by Travis Hoppe and Anna Petrone, Apr 22 2014

a(11) by Jens M. Schmidt, Feb 18 2019

a(12) from Jens M. Schmidt's web page, Jan 10 2021