A241768 Number of simple connected graphs with n nodes and exactly 2 articulation points (cutpoints).

0, 0, 0, 1, 3, 17, 101, 890, 11468, 239728

Offset

1,5

Links

Table of n, a(n) for n=1..10.

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, 2014

Eric Weisstein's World of Mathematics, Articulation Vertex

Crossrefs

Column k=2 of A325111.

Cf. other simple connected graph sequences with k articulation points A002218, A241767, A241768, A241769, A241770, A241771.

Sequence in context: A161940 A074565 A339565 * A370286 A054365 A116886

Adjacent sequences: A241765 A241766 A241767 * A241769 A241770 A241771

Keyword

nonn,hard,more

Author

Travis Hoppe and Anna Petrone, Apr 28 2014

Status

approved