# A173849 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 24
5 120
6 720
7 5040
8 40320
9 362880
10 2903040
11 32659200
12 333849600
13 4470681600
14 55244851200
15 855496857600
16 12362073292800
17 216999220838400
18 3584572069478400
19 70276861528473600
20 1305169212624076800
21 28251875803447296000
22 582386191297118208000