# A320731 (b-file synthesized from sequence entry)
0 1
1 3
2 9
3 24
4 60
5 141
6 328
7 738
8 1647
9 3618
10 7893
11 17055
12 36619
13 78144
14 165888
15 350619
16 738012
17 1548279
18 3237611
19 6752439
20 14046525
21 29157612
22 60396996
23 124885167