# A145146 (b-file synthesized from sequence entry)
5 1
6 10
7 85
8 735
9 8449
10 112644
11 1605680
12 23932700
13 391910596
14 7073468688
15 138120962616
16 2862132655200
17 62993944853904
18 1476042415885824
19 36728281476425088
20 964322664638298624
21 26615080195964032896