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A175121 as a simple table

na(n)
14
29
325
49
525
69
749
89
949
1027
1135
1249
1333
1425
159
1625
179
18121
1915
2035
2125
2221
2335
2449
2515
2625
2727
2825
2915
30143
3125
329
3349
3421
3525
3633
3735
3825
399
4025
419
42121
4327
4449
4521
4649
4721
4825
4921
5025
519
5225
5333
5425
559
5625
5727
5835
5949
6015
61121
6215
6325
649
6525
669
67121
6815
6935
7035
71221
7225
7321

[4,9,25,9,25,9,49,9,49,27,35,49,33,25,9,25,9,121,
 15,35,25,21,35,49,15,25,27,25,15,143,25,9,49,21,
 25,33,35,25,9,25,9,121,27,49,21,49,21,25,21,25,9,
 25,33,25,9,25,27,35,49,15,121,15,25,9,25,9,121,15,
 35,35,221,25,21]