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A009103 as a simple table

na(n)
01
10
20
3-3
411
5-70
6534
7-4725
847753
9-542988
106859084
11-95298995
121444301715
13-23711336922
14419190167434
15-7939747234965
16160403009819921
17-3442962495033400
1878246246638467512
19-1877007578925506787

[1,0,0,-3,11,-70,534,-4725,47753,-542988,6859084,
 -95298995,1444301715,-23711336922,419190167434,
 -7939747234965,160403009819921,-3442962495033400,
 78246246638467512,-1877007578925506787]