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A159529 as a simple table

na(n)
01
12
2-574
3-3460
4988396
59976312
6-2836511816
7-40270873648
811395985060240
9209004489868832
10-58863905303630816
11-1325773762049110592
12371605162396386506944
139938777138365404080000
14-2772363635969717405017216
15-85969311875592284625394432
1623864454100106265332248473856

[1,2,-574,-3460,988396,9976312,-2836511816,
 -40270873648,11395985060240,209004489868832,
 -58863905303630816,-1325773762049110592,
 371605162396386506944,9938777138365404080000,
 -2772363635969717405017216,
 -85969311875592284625394432,
 23864454100106265332248473856]