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A350509 as a simple table

na(n)
11
21
33
42
55
62
77
84
99
105
1111
123
1313
147
1515
168
1717
186
1919
2010
2121
2211
2323
246
2525
2613
2727
2814
2929
3010
3131
3216
3333
3417
3535
369
3737
3819
3939
4020
4141
4214
4343
4422
4545
4623
4747
4812
4949
5025
5151
5226
5353
5418
5555
5628
5757
5829
5959
6010
6161
6231
6363
6432
6565
6622
6767
6834
6969
7035
7171
7218
7373
7437
7575

[1,1,3,2,5,2,7,4,9,5,11,3,13,7,15,8,17,6,19,10,21,
 11,23,6,25,13,27,14,29,10,31,16,33,17,35,9,37,19,
 39,20,41,14,43,22,45,23,47,12,49,25,51,26,53,18,
 55,28,57,29,59,10,61,31,63,32,65,22,67,34,69,35,
 71,18,73,37,75]