# A147235 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 3
9 7
10 15
11 31
12 65
13 185
14 517
15 1673
16 6585
17 26113
18 126591
19 608081
20 3381041
21 20245821
22 136182387