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A368013 as a simple table

na(n)
01
1-1
2-1
35
411
5-91
6-301
73485
815371
9-228811
10-1261501
1122951565
12151846331
13-3264973531
14-25201039501
15625232757245
165515342166891
17-155079142742251
18-1538993024478301
1948364005482108525
20533289474412481051
21-18523127502677822971

[1,-1,-1,5,11,-91,-301,3485,15371,-228811,
 -1261501,22951565,151846331,-3264973531,
 -25201039501,625232757245,5515342166891,
 -155079142742251,-1538993024478301,
 48364005482108525,533289474412481051,
 -18523127502677822971]