# A337906 (b-file synthesized from sequence entry)
2 1
3 6
4 34
5 200
6 1095
7 6230
8 34636
9 195552
10 1099140
11 6218520
12 35210736
13 200099328
14 1139401263
15 6504768270
16 37211008120
17 213311576192
18 1225053737622
19 7047867363108
20 40612374024300
21 234376628718960
22 1354498970905080
23 7838134441085520
24 45412879702456800
25 263417461793120000