# A274268 (b-file synthesized from sequence entry)
1 1
2 7
3 26
4 50
5 24
6 -24
7 48
8 -144
9 576
10 -2880
11 17280
12 -120960
13 967680
14 -8709120
15 87091200
16 -958003200
17 11496038400
18 -149448499200
19 2092278988800
20 -31384184832000
21 502146957312000
22 -8536498274304000
23 153656968937472000
24 -2919482409811968000
25 58389648196239360000