# A073315 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 2
5 9
6 6
7 6
8 44
9 72
10 24
11 24
12 250
13 700
14 600
15 120
16 120
17 1644
18 6750
19 10200
20 5400
21 720
22 720
23 12348
24 68208
25 154350
26 147000
27 52920
28 5040
29 5040
30 104544
31 735392
32 2274384
33 3292800
34 2163840
35 564480
36 40320
37 40320
38 986256
39 8504928
40 33911136