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A210657 as a simple table

na(n)
01
1-2
222
3-602
430742
5-2523002
6303692662
7-50402079002
811030684333782
9-3077986048956602
101066578948824962102
11-449342758735568563802
12226182806795367665865622
13-134065091768709178087428602
1492423044260377387363207812342
15-73323347841467639992211297199002

[1,-2,22,-602,30742,-2523002,303692662,
 -50402079002,11030684333782,-3077986048956602,
 1066578948824962102,-449342758735568563802,
 226182806795367665865622,
 -134065091768709178087428602,
 92423044260377387363207812342,
 -73323347841467639992211297199002]