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A176993 as a simple table

na(n)
0-1
13
26
3-20
412
5210
640
7360
8-3024
9180
10840
1155440
121008
133360
1460480
15-1235520
166720
1718144
18151200
1932432400
2051840
21120960
22665280
2319958400
24-980179200
25453600
26950400
273991680
2851891840
2933522128640
304435200
318553600
3229652480
33242161920
3410897286400
35-1279935820800

[-1,3,6,-20,12,210,40,360,-3024,180,840,55440,
 1008,3360,60480,-1235520,6720,18144,151200,
 32432400,51840,120960,665280,19958400,-980179200,
 453600,950400,3991680,51891840,33522128640,
 4435200,8553600,29652480,242161920,10897286400,
 -1279935820800]