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A084208 as a simple table

na(n)
01
11
2-3
315
4-82
5484
6-2992
719110
8-124979
9832234
10-5621028
1138402783
12-264858143
131841221687
14-12886279885
1590713376563
16-641815393278
174561172770669
18-32542369727538
19232992967457839

[1,1,-3,15,-82,484,-2992,19110,-124979,832234,
 -5621028,38402783,-264858143,1841221687,
 -12886279885,90713376563,-641815393278,
 4561172770669,-32542369727538,232992967457839]