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A103996 as a simple table

na(n)
01
1-1
22
3-9
474
5-955
617744
7-448077
814751974
9-613569711
1031452344252
11-1947832408225
12143356013568338
13-12366684481981635
141235842203066704648
15-141628365906835323573
1618449654196553852968254

[1,-1,2,-9,74,-955,17744,-448077,14751974,
 -613569711,31452344252,-1947832408225,
 143356013568338,-12366684481981635,
 1235842203066704648,-141628365906835323573,
 18449654196553852968254]