# A075071 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 12
5 120
6 60
7 5040
8 840
9 60480
10 15120
11 39916800
12 2310
13 6227020800
14 8648640
15 1816214400
16 10810800
17 355687428096000
18 2042040
19 121645100408832000
20 116396280
21 1689515283456000
22 14079294028800
23 25852016738884976640000