# A052589 (b-file synthesized from sequence entry)
0 0
1 1
2 6
3 42
4 360
5 3720
6 45360
7 640080
8 10281600
9 185431680
10 3712262400
11 81709689600
12 1961511552000
13 51005527372800
14 1428241944729600
15 42848566016256000
16 1371175035310080000
17 46620306887970816000
18 1678337450340655104000
19 63776944758045302784000