Research Article

Distance-Based Polynomials and Topological Indices for Hierarchical Hypercube Networks

Table 4

Number of pair of vertices of HHC-2 at different distances.

mn
345678...

7192320448576704832...
8136264392520648776...
9192320448576704...
10136264392520648...
11192320448576...
12136264392520...
13192320448...
14136264392...
15192320...
16136264...
17192...
18136...
19...
20..
21.