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A159517 as a simple table

na(n)
01
116
2-194
3-17504
4-18164
531216576
6540334216
7-75639407744
8-2912283304304
9225705335009536
1015406032742583776
11-769177483661571584
12-88566701814374836544
132736491182742489168896
14561899064537972620484736
15-8249509418670119836289024

[1,16,-194,-17504,-18164,31216576,540334216,
 -75639407744,-2912283304304,225705335009536,
 15406032742583776,-769177483661571584,
 -88566701814374836544,2736491182742489168896,
 561899064537972620484736,
 -8249509418670119836289024]