# A189869 (b-file synthesized from sequence entry)
1 1
2 0
3 0
4 2
5 10
6 4
7 28
8 20
9 56
10 72
11 288
12 1304
13 6368
14 22884
15 125864
16 755412
17 4565572
18 29862256
19 207238124
20 1540506028
21 11774180220