# A182918 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 1
4 120
5 1
6 1512
7 1
8 17280
9 1
10 190080
11 1
12 1415232000
13 1
14 21772800
15 1
16 829108224000
17 1
18 105082151731200
19 1
20 4345502515200000
21 1
22 19989311569920000
23 1
24 626378114550988800000
25 1
26 17896517558599680000
27 1
28 944578196742891110400000