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A123957 as a simple table

na(n)
10
20
30
41
50
63
7-4
85
9-24
1019
11-76
12133
13-208
14627
15-852
162181
17-4232
187443
19-18012
2030533
21-66880
22133875
23-250724
24547013
25-1020152
262108435
27-4245612
288217861
29-17089968
3033202291
31-67158900
32135095301
33-265925992
34541112339
35-1069523580
362146659781
37-4309316128
388553624307

[0,0,0,1,0,3,-4,5,-24,19,-76,133,-208,627,-852,
 2181,-4232,7443,-18012,30533,-66880,133875,
 -250724,547013,-1020152,2108435,-4245612,8217861,
 -17089968,33202291,-67158900,135095301,-265925992,
 541112339,-1069523580,2146659781,-4309316128,
 8553624307]