# A131980 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 2
4 24
5 24
6 120
7 240
8 24
9 720
10 2400
11 720
12 5040
13 25200
14 15120
15 720
16 40320
17 282240
18 282240
19 40320
20 362880
21 3386880
22 5080320
23 1451520
24 40320
25 3628800
26 43545600
27 91445760
28 43545600
29 3628800
30 39916800
31 598752000
32 1676505600
33 1197504000
34 199584000
35 3628800