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A353948 as a simple table

na(n)
11
20
31
40
52
6-3
74
8-4
94
10-10
1114
12-25
1330
14-48
1548
16-86
17128
18-192
19286
20-470
21578
22-1000
231386
24-2423
253172
26-5198
277102
28-11994
2916414
30-25820
3138056
32-61444
3386658
34-141564
35203396
36-324640
37475536
38-767110
391100728
40-1810752
412601166
42-4118166
436114666

[1,0,1,0,2,-3,4,-4,4,-10,14,-25,30,-48,48,-86,128,
 -192,286,-470,578,-1000,1386,-2423,3172,-5198,
 7102,-11994,16414,-25820,38056,-61444,86658,
 -141564,203396,-324640,475536,-767110,1100728,
 -1810752,2601166,-4118166,6114666]