The difference between the link num and the configuration of connections & the routing entries missing

i use gen_HPN_7.0_topo_mulgpus_one_link.py to generate a topology file as following:

18 8 1 9 20 A100
8 9 10 11 12 13 14 15 16 17
0 8 2400Gbps 0.000025ms 0
0 9 100Gbps 0.0005ms 0
1 8 2400Gbps 0.000025ms 0
1 10 100Gbps 0.0005ms 0
2 8 2400Gbps 0.000025ms 0
2 11 100Gbps 0.0005ms 0
3 8 2400Gbps 0.000025ms 0
3 12 100Gbps 0.0005ms 0
4 8 2400Gbps 0.000025ms 0
4 13 100Gbps 0.0005ms 0
5 8 2400Gbps 0.000025ms 0
5 14 100Gbps 0.0005ms 0
6 8 2400Gbps 0.000025ms 0
6 15 100Gbps 0.0005ms 0
7 8 2400Gbps 0.000025ms 0
7 16 100Gbps 0.0005ms 0
9 17 400Gbps 0.0005ms 0
10 17 400Gbps 0.0005ms 0
11 17 400Gbps 0.0005ms 0
12 17 400Gbps 0.0005ms 0
13 17 400Gbps 0.0005ms 0
14 17 400Gbps 0.0005ms 0
15 17 400Gbps 0.0005ms 0
16 17 400Gbps 0.0005ms 0

as the tutorials mentioned, the Total number of connections is 20 in the first line, but the configurations of all connections as the line 3-26 showing, which means the number of connections is 24 in pratice. When i use function printRoutingEntries () to print the routing entries,the connections of 13,14,15,16-17 are missing.

So my questions are: how to recognize difference between the link num and the configuration of connections？And why the connections of 13,14,15,16-17 are removed in the routing entries？

Reproduce the topology with gen_HPN_7.0_topo_mulgpus_one_link.py and compare the declared connection count with the entries in lines 3–26. Then trace function printRoutingEntries () to determine why the 13–16 to 17 connections are absent; done means documenting the distinction and explaining the omitted routing entries.