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A203004 as a simple table

na(n)
11
2-1
31
4-18
51
61
7-84
8116
9-1
101
11-439
121221
13-839
141
151
16-2475
1710435
18-13855
195658
20-1
211
22-14312
2381690
24-165715
25138669
26-39038
271
281
29-83270
30601411
31-1661956
322164099
33-1292751
34266899
35-1
361
37-485157

[1,-1,1,-18,1,1,-84,116,-1,1,-439,1221,-839,1,1,
 -2475,10435,-13855,5658,-1,1,-14312,81690,-165715,
 138669,-39038,1,1,-83270,601411,-1661956,2164099,
 -1292751,266899,-1,1,-485157]