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A121622 as a simple table

na(n)
01
13
25
3-9
4-119
5-597
6-2035
7-4449
8-239
956403
10341525
111315911
123455641
133627003
14-23161315
15-186118929
16-815616479
17-2474152797
18-4241902555
196712571031
2095420159401
21485257533003
221671083125805
233718150825791
24584824319281

[1,3,5,-9,-119,-597,-2035,-4449,-239,56403,341525,
 1315911,3455641,3627003,-23161315,-186118929,
 -815616479,-2474152797,-4241902555,6712571031,
 95420159401,485257533003,1671083125805,
 3718150825791,584824319281]