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A015121 as a simple table

na(n)
01
11
21
31
4-8
51
61
773
873
91
101
11-656
125986
13-656
141
151
165905
17484210
18484210
195905
201
211
22-53144
2339226915
24-352504880
2539226915
26-53144
271
281
29478297
303177326971
31257015284435
32257015284435
333177326971
34478297
351
361
37-4304672
38257363962948

[1,1,1,1,-8,1,1,73,73,1,1,-656,5986,-656,1,1,5905,
 484210,484210,5905,1,1,-53144,39226915,-352504880,
 39226915,-53144,1,1,478297,3177326971,
 257015284435,257015284435,3177326971,478297,1,1,
 -4304672,257363962948]