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A373169 as a simple table

na(n)
21
31
42
51
63
73
81
94
106
114
121
135
149
151
165
171
186
1912
2016
216
226
231
247
2515
2622
2725
2812
297
301
318
3218
3328
3435
3536
3619
378
381
399
4021
4134
4245
4351
4449
4527
469
471
481
4924
504
5155
5266
537
5464
5536
561
571
5811
5918
6046
6129
6281
6391
6429
6581
6646
672
681
6912
703
7143
7275
736
74112
7512
7654
771
7857
793

[1,1,2,1,3,3,1,4,6,4,1,5,9,1,5,1,6,12,16,6,6,1,7,
 15,22,25,12,7,1,8,18,28,35,36,19,8,1,9,21,34,45,
 51,49,27,9,1,1,24,4,55,66,7,64,36,1,1,11,18,46,29,
 81,91,29,81,46,2,1,12,3,43,75,6,112,12,54,1,57,3]