# A151520 (b-file synthesized from sequence entry)
1 1
2 4
3 6
4 21
5 47
6 134
7 323
8 876
9 2224
10 5885
11 15146
12 39574
13 102250
14 265574
15 686208
16 1775646
17 4583718
18 11835037
19 30515520
20 78652647