# A009207 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 3
4 8
5 17
6 88
7 315
8 2176
9 9505
10 78080
11 413523
12 4159616
13 26287601
14 307882240
15 2238416523
16 29920681984
17 246589091137
18 3710767394816
19 34186190864163
20 571523842998272
21 5819027995038161
22 107010484096565248