# A262590 (b-file synthesized from sequence entry)
3 0
4 2
5 6
6 18
7 62
8 210
9 728
10 2570
11 9198
12 33288
13 121574
14 447394
15 1657008
16 6170930
17 23091222
18 86767016
19 327235610
20 1238188770
21 4698767640