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A143769 as a simple table

na(n)
1-3
20
327
4-18
5-63
636
7207
8-126
9-603
10360
111827
12-1098
13-5463
143276
1516407
16-9846
17-49203
1829520
19147627
20-88578
21-442863
22265716
231328607
24-797166
25-3985803
262391480
2711957427
28-7174458
29-35872263
3021523356
31107616807
32-64570086
33-322850403
34193710240

[-3,0,27,-18,-63,36,207,-126,-603,360,1827,-1098,
 -5463,3276,16407,-9846,-49203,29520,147627,-88578,
 -442863,265716,1328607,-797166,-3985803,2391480,
 11957427,-7174458,-35872263,21523356,107616807,
 -64570086,-322850403,193710240]