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A050276 as a simple table

na(n)
01
1-1
21
31
4-1
5-1
6-1
71
819
911
101
11-5
12-901
13-7
14-1
155
16367
1718889
1817
191
20-5
21-407
22-6649
23-2131
24-1
25-1
2641
27427
2826405
2988651
3011153
3123
321
33-2603
34-3781
35-21543701
36-66727
37-8503
38-13
39-1

[1,-1,1,1,-1,-1,-1,1,19,11,1,-5,-901,-7,-1,5,367,
 18889,17,1,-5,-407,-6649,-2131,-1,-1,41,427,26405,
 88651,11153,23,1,-2603,-3781,-21543701,-66727,
 -8503,-13,-1]