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A009628 as a simple table

na(n)
00
11
2-2
37
4-28
5141
6-846
75923
8-47384
9426457
10-4264570
1146910271
12-562923252
137318002277
14-102452031878
151536780478171
16-24588487650736
17418004290062513
18-7524077221125234
19142957467201379447
20-2859149344027588940
2160042136224579367741

[0,1,-2,7,-28,141,-846,5923,-47384,426457,
 -4264570,46910271,-562923252,7318002277,
 -102452031878,1536780478171,-24588487650736,
 418004290062513,-7524077221125234,
 142957467201379447,-2859149344027588940,
 60042136224579367741]