# A128243 (b-file synthesized from sequence entry)
3 0
4 0
5 0
6 1
7 1
8 6
9 17
10 69
11 239
12 962
13 3864
14 17049
15 79607
16 403758
17 2209386
18 13138818
19 84841130
20 595825731