# A147470 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 3
5 5
6 9
7 19
8 55
9 245
10 1021
11 4107
12 20679
13 138093
14 1077295
15 9543083
16 95957809
17 1121795793
18 15620825665
19 256368054863
20 4898555273539
21 109719649027999
22 2878513446258779
23 87946594793312351