# A056238 (b-file synthesized from sequence entry)
1 6
2 252
3 272
4 858
5 2772
6 4004
7 6006
8 289982
9 2370732
10 2629262
11 6039306
12 27999972
13 28233282
14 2704884072
15 20278187202
16 20591819502
17 2592587852952
18 2936231326392
19 21809166190812
20 27237788773272
21 229145919541922