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A175509 as a simple table

na(n)
1-2
2-2
3-3
42
5-2
64
7-4
82
91
105
11-4
121
137
149
159
161
17-3
189
198
207
217
229
2311
245
25-2
264
27-3
28-1
296
3011
3112
3216
3317
3419
352
36-5
37-11
38-10
39-1
407
4110
4216
439
4412
4521
4613
4715
4816
4915
5022
5111
5210
5311
5413
559
5617
577
589
5911
6012
6117
626
63-4
643
657
667
6715
6827
6921
7025
7128
7235
7337
7443
7543
7641
7731
7831
7920

[-2,-2,-3,2,-2,4,-4,2,1,5,-4,1,7,9,9,1,-3,9,8,7,7,
 9,11,5,-2,4,-3,-1,6,11,12,16,17,19,2,-5,-11,-10,
 -1,7,10,16,9,12,21,13,15,16,15,22,11,10,11,13,9,
 17,7,9,11,12,17,6,-4,3,7,7,15,27,21,25,28,35,37,
 43,43,41,31,31,20]