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A143628 as a simple table

na(n)
01
10
20
3-1
4-6
5-25
6-89
7-280
8-700
9-380
1013452
11149831
121214852
138700263
1457515640
15351296151
161909757620
178017484274
185703377941
19-428273438434
20-7295220035921
21-89868583754993
22-970185398785810
23-9657428906237364

[1,0,0,-1,-6,-25,-89,-280,-700,-380,13452,149831,
 1214852,8700263,57515640,351296151,1909757620,
 8017484274,5703377941,-428273438434,
 -7295220035921,-89868583754993,-970185398785810,
 -9657428906237364]