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A159508 as a simple table

na(n)
01
13
2-89
3-855
423601
5405963
6-10346601
7-269746047
86288530145
9230346491283
10-4855444114041
11-240305893799463
124513251073537809
13296139484328781915
14-4861463414700822921
15-420887762743191256143
165883687931380635925441
17677603075775465797408547

[1,3,-89,-855,23601,405963,-10346601,-269746047,
 6288530145,230346491283,-4855444114041,
 -240305893799463,4513251073537809,
 296139484328781915,-4861463414700822921,
 -420887762743191256143,5883687931380635925441,
 677603075775465797408547]