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A191470 as a simple table

na(n)
01
10
22
3-3
428
5-120
61122
7-8127
888096
9-885216
1011291624
11-143432883
122131731944
13-32515910232
14555050034224
15-9845456006487
16190381188822016
17-3842126730651264
1883143449079579584
19-1878918839085535971
2045029979676319086976

[1,0,2,-3,28,-120,1122,-8127,88096,-885216,
 11291624,-143432883,2131731944,-32515910232,
 555050034224,-9845456006487,190381188822016,
 -3842126730651264,83143449079579584,
 -1878918839085535971,45029979676319086976]