# A052612 (b-file synthesized from sequence entry)
0 0
1 2
2 2
3 12
4 24
5 240
6 720
7 10080
8 40320
9 725760
10 3628800
11 79833600
12 479001600
13 12454041600
14 87178291200
15 2615348736000
16 20922789888000
17 711374856192000
18 6402373705728000
19 243290200817664000
20 2432902008176640000
21 102181884343418880000
22 1124000727777607680000