A324061 Number of simple connected graphs on n unlabeled nodes with radius 2.

0, 0, 0, 2, 10, 76, 682, 9864, 245518, 11366961

Offset: 1

Author

Andrew Howroyd, Sep 03 2019

Keywords

• nonn
• more

Links

• Eric Weisstein's World of Mathematics, Graph Radius.
• Wikipedia, Distance (graph theory).

Crossrefs

Column k=2 of A324239.