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A029878 as a simple table

na(n)
11
21
30
4-2
51
60
7-1
81
92
10-3
11-2
125
131
14-6
151
168
17-6
18-10
1914
207
21-25
228
2336
24-34
25-41
2672
2725
28-125
2929
30187
31-150
32-216
33361
34137
35-657
36159
37977
38-810
39-1135
401937
41752
42-3558
43792
445361
45-4327
46-6318
4710641
484281
49-19848
504286

[1,1,0,-2,1,0,-1,1,2,-3,-2,5,1,-6,1,8,-6,-10,14,7,
 -25,8,36,-34,-41,72,25,-125,29,187,-150,-216,361,
 137,-657,159,977,-810,-1135,1937,752,-3558,792,
 5361,-4327,-6318,10641,4281,-19848,4286]