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A331523 as a simple table

na(n)
11
21
33
42
51
63
77
88
97
101
1113
126
1315
1415
1512
1616
1716
182
1910
2020
2118
2221
237
2416
259
2622
2713
2822
2923
3024
3120
3210
3325
3412
3525
3622
3726
3827
3911
4026
4128
4230
4327
4431
4522
4631
4734
4830
4935
5036
5128
5231
5337
548
5537
5616
5727
5836
5935
6040
611
623
6313
6431
6537
6628
6733
6842
6921

[1,1,3,2,1,3,7,8,7,1,13,6,15,15,12,16,16,2,10,20,
 18,21,7,16,9,22,13,22,23,24,20,10,25,12,25,22,26,
 27,11,26,28,30,27,31,22,31,34,30,35,36,28,31,37,8,
 37,16,27,36,35,40,1,3,13,31,37,28,33,42,21]