# A294832 (b-file synthesized from sequence entry)
0 4
1 36
2 252
3 1197
4 47880
5 1388520
6 23604840
7 153431460
8 843873030
9 2953555605
10 17721333630
11 2091117368340
12 33457877893440
13 769531191549120
14 28472654087317440
15 2249339672898077760
16 2249339672898077760
17 200191230887928920640
18 9408987851732659270080
19 1881797570346531854016