# A147281 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 21
10 49
11 87
12 289
13 1009
14 3425
15 11605
16 48481
17 255569
18 1441107
19 8859577
20 59249469
21 422335799