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A294976 as a simple table

na(n)
01
1-30
2-11340
3-3912600
4-1520905170
5-636170644008
6-278687199310200
7-126000360658968000
8-58290111778749466140
9-27440829122946510954630
10-13096614404248661886145848
11-6320198941502349713305002120
12-3077986352751848627729986859400

[1,-30,-11340,-3912600,-1520905170,-636170644008,
 -278687199310200,-126000360658968000,
 -58290111778749466140,-27440829122946510954630,
 -13096614404248661886145848,
 -6320198941502349713305002120,
 -3077986352751848627729986859400]