# A309900 (b-file synthesized from sequence entry)
0 0
1 1
2 4
3 13
4 67
5 229
6 229
7 958
8 958
9 7519
10 27202
11 27202
12 204349
13 1267231
14 1267231
15 10833169
16 39530983
17 125624425
18 125624425
19 125624425
20 1287885892
21 4774670293
22 15235023496
23 46616083105
24 140759261932
25 140759261932
26 988047871375
27 3529913699704
28 11155511184691