login

A274268 as a simple table

na(n)
11
27
326
450
524
6-24
748
8-144
9576
10-2880
1117280
12-120960
13967680
14-8709120
1587091200
16-958003200
1711496038400
18-149448499200
192092278988800
20-31384184832000
21502146957312000
22-8536498274304000
23153656968937472000
24-2919482409811968000
2558389648196239360000

[1,7,26,50,24,-24,48,-144,576,-2880,17280,-120960,
 967680,-8709120,87091200,-958003200,11496038400,
 -149448499200,2092278988800,-31384184832000,
 502146957312000,-8536498274304000,
 153656968937472000,-2919482409811968000,
 58389648196239360000]