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A073498 as a simple table

na(n)
03
14
24
3-2
4-24
5-76
6-164
7-248
8-160
9520
102544
116736
1212720
1315552
14-640
15-70432
16-246784
17-565824
18-923456
19-792448
201239296
217864960
2222439168
2345045504
2461276928
2519713024
26-198718464
27-790598144
28-1930655744
29-3376471040
30-3503145984
312384930816
3223805657088

[3,4,4,-2,-24,-76,-164,-248,-160,520,2544,6736,
 12720,15552,-640,-70432,-246784,-565824,-923456,
 -792448,1239296,7864960,22439168,45045504,
 61276928,19713024,-198718464,-790598144,
 -1930655744,-3376471040,-3503145984,2384930816,
 23805657088]