# A320180 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 32
5 126
6 564
7 2700
8 13802
9 74422
10 422812
11 2519962
12 15731562
13 102390662
14 692779852
15 4851392308
16 35068814616
17 261013287116
18 1997276928946
19 15689964298430
20 126416353430344
21 1043615269337354
22 8819704403143576
23 76229300376178238
24 673190822341507644