# A050149 (b-file synthesized from sequence entry)
3 1
4 15
5 80
6 432
7 2352
8 12896
9 71136
10 394400
11 2196128
12 12273648
13 68811184
14 386838480
15 2179890000
16 12309739968
17 69641542848
18 394643939904
19 2239678552640
20 12727572969680
21 72415319422992
22 412470467298032