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A213145 as a simple table

na(n)
01
1-5
2-5
3295
41195
5-68705
6-604205
733497095
8521891995
9-27561957905
10-685542701405
1133989796735895
121270896506674795
13-58096477696175105
14-3155667333487086605
15129898710835267046695

[1,-5,-5,295,1195,-68705,-604205,33497095,
 521891995,-27561957905,-685542701405,
 33989796735895,1270896506674795,
 -58096477696175105,-3155667333487086605,
 129898710835267046695]