# A195261 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 12
4 56
5 284
6 1520
7 8449
8 48303
9 282207
10 1677489
11 10112546
12 61678702
13 379919672
14 2359991520
15 14767164162
16 92993252612
17 588904075546
18 3748029131834
19 23960546501520
20 153790930664222
21 990690415079898
22 6402865318618654
23 41506375396111624