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A012023 as a simple table

na(n)
01
1-1
213
3-421
425369
5-2449801
6346065061
7-67243537453
817192488230961
9-5593309059948049
102255588021494237501
11-1103994926592923677621
12644587811150505183179593
13-442516027690815793746696601

[1,-1,13,-421,25369,-2449801,346065061,
 -67243537453,17192488230961,-5593309059948049,
 2255588021494237501,-1103994926592923677621,
 644587811150505183179593,
 -442516027690815793746696601]