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A144505 as a simple table

na(n)
01
11
2-1
32
41
5-5
67
7-1
89
9-30
1037
111
12-14
1381
14-229
15266
16-1
1720
18-175
19835
20-2165
212431
221
23-27
24330
25-2330
269990
27-24576
2827007
29-1
3035
31-567
325495
33-34300
34137466
35-326515
36353522
371
38-44
39910
40-11522
4197405
42-561386
432148139
44-4976315
455329837

[1,1,-1,2,1,-5,7,-1,9,-30,37,1,-14,81,-229,266,-1,
 20,-175,835,-2165,2431,1,-27,330,-2330,9990,
 -24576,27007,-1,35,-567,5495,-34300,137466,
 -326515,353522,1,-44,910,-11522,97405,-561386,
 2148139,-4976315,5329837]