# A124902 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 6
6 10
7 120
8 35
9 280
10 4536
11 362880
12 5775
13 39916800
14 24710400
15 8408400
16 2627625
17 1307674368000
18 2858856000
19 355687428096000
20 15277011750
21 4345461120000
22 4989349821456000
23 51090942171709440000
24 45092646348750
25 242362656927046656