# A058380 (b-file synthesized from sequence entry)
0 0
1 0
2 1
3 1
4 13
5 66
6 796
7 8338
8 122326
9 1893748
10 34717076
11 695343144
12 15560613872
13 379211091416
14 10070672083928
15 288420300817184
16 8877044175277216
17 291944826030636000
18 10221726849956763136
19 379528960298122277536
20 14896869800297864928736