# A081809 (b-file synthesized from sequence entry)
3 1
4 3
5 3
6 10
7 12
8 35
9 58
10 160
11 341
12 958
13 2444
14 7242
15 21190
16 67217
17 217335
18 740542
19 2593802
20 9444080
21 35383843