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A321559 as a simple table

na(n)
11
2-9
328
4-57
5126
6-252
7344
8-441
9757
10-1134
111332
12-1596
132198
14-3096
153528
16-3513
174914
18-6813
196860
20-7182
219632
22-11988
2312168
24-12348
2515751
26-19782
2720440
28-19608
2924390
30-31752
3129792
32-28089
3337296
34-44226
3543344
36-43149
3750654

[1,-9,28,-57,126,-252,344,-441,757,-1134,1332,
 -1596,2198,-3096,3528,-3513,4914,-6813,6860,-7182,
 9632,-11988,12168,-12348,15751,-19782,20440,
 -19608,24390,-31752,29792,-28089,37296,-44226,
 43344,-43149,50654]