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A092398 as a simple table

na(n)
01
11
2-4
3-3
4-16
5-15
6144
7105
81024
9945
10-14400
11-10395
12-147456
13-135135
142822400
152027025
1637748736
1734459425
18-914457600
19-654729075
20-15099494400
21-13749310575
22442597478400
23316234143225
248697308774400
257905853580625
26-299195895398400
27-213458046676875
28-6818690079129600
29-6190283353629375

[1,1,-4,-3,-16,-15,144,105,1024,945,-14400,-10395,
 -147456,-135135,2822400,2027025,37748736,34459425,
 -914457600,-654729075,-15099494400,-13749310575,
 442597478400,316234143225,8697308774400,
 7905853580625,-299195895398400,-213458046676875,
 -6818690079129600,-6190283353629375]