# A006204 (b-file synthesized from sequence entry)
1 1
2 1
3 3
4 9
5 25
6 133
7 631
8 3857
9 25905
10 188181
11 1515283
12 13376125
13 128102625
14 1317606101
15 14534145947
16 170922533545
17 2138089212789