# A052632 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 24
5 240
6 2160
7 20160
8 201600
9 2177280
10 29030400
11 439084800
12 7185024000
13 124540416000
14 2266635571200
15 44460928512000
16 941525544960000
17 21341245685760000
18 512189896458240000