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A309531 as a simple table

na(n)
21
31
40
50
62
72
8-3
91
105
115
12-2
13-2
144
1510
16-6
17-6
181
191
20-8
210
2210
2310
24-16
25-8
264
2718
287
297
3013
3113
32-19
33-7
349
3519
36-11
37-11
387
3921
40-15
41-15
42-5
43-5
44-20
4510
4632
4732
48-36
49-24
50-1
5117
520
530
5418
5532
56-14
576
5834
5934
60-23
61-23
627
6345
64-29
65-13
665
675
68-16
698
7030
7130
72-66

[1,1,0,0,2,2,-3,1,5,5,-2,-2,4,10,-6,-6,1,1,-8,0,
 10,10,-16,-8,4,18,7,7,13,13,-19,-7,9,19,-11,-11,7,
 21,-15,-15,-5,-5,-20,10,32,32,-36,-24,-1,17,0,0,
 18,32,-14,6,34,34,-23,-23,7,45,-29,-13,5,5,-16,8,
 30,30,-66]