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A002286 as a simple table

na(n)
11
2-8
310
480
5-231
6-248
71466
8-80
9-4766
101944
119600
12-2704
13-15525
14-3984
1525498
1610816
17-29760
18800
191994
20-11728
2129362
22-5560
23-2310
24-1952
2521649
2638128
27-192854
28-2480
29233280
30-20248
31-10918
32-18480
3314660
34-101768
35-324480
36137424

[1,-8,10,80,-231,-248,1466,-80,-4766,1944,9600,
 -2704,-15525,-3984,25498,10816,-29760,800,1994,
 -11728,29362,-5560,-2310,-1952,21649,38128,
 -192854,-2480,233280,-20248,-10918,-18480,14660,
 -101768,-324480,137424]