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A276816 as a simple table

na(n)
1-24
2480
3-120
46720
53360
6-241920
71774080
8-560
940320
1040320
11-1774080
1220160
13-3548160
1461501440
15-591360
1692252160
17-1845043200
188364195840
19-2520
20221760
21221760
22-11531520
23221760
24-23063040
25461260800
26110880
27-23063040
28-11531520
291383782400
30-15682867200
31-11531520
32691891200
331383782400
34-62731468800
35476759162880

[-24,480,-120,6720,3360,-241920,1774080,-560,
 40320,40320,-1774080,20160,-3548160,61501440,
 -591360,92252160,-1845043200,8364195840,-2520,
 221760,221760,-11531520,221760,-23063040,
 461260800,110880,-23063040,-11531520,1383782400,
 -15682867200,-11531520,691891200,1383782400,
 -62731468800,476759162880]