# A146853 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 3
8 15
9 39
10 71
11 173
12 597
13 1851
14 6753
15 30359
16 143255
17 790071
18 4528523
19 29159423
20 204966875
21 1600354339