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A146311 as a simple table

na(n)
01
1-5
249
3-485
44801
5-47525
6470449
7-4656965
846099201
9-456335045
104517251249
11-44716177445
12442644523201
13-4381729054565
1443374646022449
15-429364731169925
164250272665676801
17-42073361925598085
18416483346590304049

[1,-5,49,-485,4801,-47525,470449,-4656965,
 46099201,-456335045,4517251249,-44716177445,
 442644523201,-4381729054565,43374646022449,
 -429364731169925,4250272665676801,
 -42073361925598085,416483346590304049]