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A156370 as a simple table

na(n)
01
1-1
2-45
3143
410845
5-58081
6-6467985
748571823
87193829465
9-69471000001
10-12857719720725
11151763444497103
1233705032917690485
13-470164385248041121
14-121821103620727531065
151960764928973430783983
16580617476571375848857905
17-10591336845363318048877441

[1,-1,-45,143,10845,-58081,-6467985,48571823,
 7193829465,-69471000001,-12857719720725,
 151763444497103,33705032917690485,
 -470164385248041121,-121821103620727531065,
 1960764928973430783983,580617476571375848857905,
 -10591336845363318048877441]