# A289883 (b-file synthesized from sequence entry)
1 1
2 3
3 3
4 11
5 23
6 73
7 211
8 651
9 2371
10 7401
11 30151
12 107713
13 456409
14 1888753
15 8148451
16 37754791
17 170459451
18 842310755
19 4096595827
20 20984546901