# A055553 (b-file synthesized from sequence entry)
1 0
2 0
3 1
4 7
5 16
6 43
7 105
8 255
9 646
10 1547
11 3605
12 8241
13 19279
14 44706
15 105212
16 246683
17 585355
18 1401644
19 3381806
20 8220777
21 20138200
22 49679870