# A307568 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 11
4 53
5 367
6 2680
7 22794
8 216830
9 2325825
10 27553582
11 351008143
12 4810073427
13 70013351163
14 1082415831294
15 17747223519590
16 308327844386251
17 5667992273930453
18 109909795136025124
19 2239594732588547820
20 47747134765967675665
21 1060822117856654685661
22 24480836958809924299702