# A147181 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 5
7 17
8 37
9 129
10 675
11 4545
12 33673
13 284663
14 3050875
15 41150087
16 686710451
17 13852947253
18 339116701643
19 10235218350849
20 379099740909573