# A350268 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 22
4 168
5 1720
6 22670
7 368784
8 7134148
9 159416704
10 4027395330
11 113235212800
12 3501763366904
13 118024658758656
14 4303855119215782
15 168777440194263040
16 7081468496171815500
17 316501174908316647424
18 15010862087643791689322
19 752916261526858377363456