# A028351 (b-file synthesized from sequence entry)
1 1
2 0
3 1
4 1
5 5
6 9
7 33
8 85
9 276
10 827
11 2693
12 8626
13 28639
14 95393
15 323367
16 1104525
17 3813797
18 13266366
19 46509357
20 164098390