# A109570 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 6
4 28
5 160
6 1086
7 8624
8 78296
9 799488
10 9070810
11 113208832
12 1541351604
13 22734473216
14 361121134934
15 6145880954880
16 111569141960752
17 2151953994809344
18 43948641637067058
19 947412315736506368