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A325887 as a simple table

na(n)
11
21
3-1
44
5-2
66
7-3
816
9-1
1020
11-5
1224
13-6
1442
154
1664
17-8
1854
19-9
2080
216
22110
23-11
2496
25-2
26156
27-1
28168
29-14
30120
31-15
32256
3310
34272
3512
36216
37-18
38342
3912
40320
41-20
42252
43-21
44440
454
46506
47-23
48384
49-3
50500
5116
52624
53-26
54486
5520
56672
5718
58812
59-29
60480
61-30
62930
636
641024
6524

[1,1,-1,4,-2,6,-3,16,-1,20,-5,24,-6,42,4,64,-8,54,
 -9,80,6,110,-11,96,-2,156,-1,168,-14,120,-15,256,
 10,272,12,216,-18,342,12,320,-20,252,-21,440,4,
 506,-23,384,-3,500,16,624,-26,486,20,672,18,812,
 -29,480,-30,930,6,1024,24]