# A030858 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 27
5 139
6 836
7 5855
8 46845
9 421606
10 4216064
11 46376705
12 556520461
13 7234765995
14 101286723938
15 1519300859080
16 24308813745287
17 413249833669886
18 7438497006057962
19 141331443115101290
20 2826628862302025808