# A058561 (b-file synthesized from sequence entry)
0 0
1 1
2 3
3 12
4 78
5 708
6 8256
7 117624
8 1980096
9 38456736
10 846413472
11 20819693568
12 565998548352
13 16852047061632
14 545372109629184
15 19061178127458816
16 715541912895773184
17 28713061759257037824
18 1226513716981332031488