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A262216 as a simple table

na(n)
21
31
43
54
61
77
87
95
109
1111
123
135
147
159
1615
178
185
193
2019
217
2211
2323
247
2524
265
2717
287
2914
309
3129
3231
3311
3417
3539
3611
372
383
395
4039
4119
427
4341
4411
4529
4623
4747
4815
4955
5049
5117
5211
5325
5417
5559
567
573
5829
5919
6019
6130
6229
6323
6463
6529
6611
6721
6835
6923
7039
7169
7223
7336
745
7549
763
7723
785
7977

[1,1,3,4,1,7,7,5,9,11,3,5,7,9,15,8,5,3,19,7,11,23,
 7,24,5,17,7,14,9,29,31,11,17,39,11,2,3,5,39,19,7,
 41,11,29,23,47,15,55,49,17,11,25,17,59,7,3,29,19,
 19,30,29,23,63,29,11,21,35,23,39,69,23,36,5,49,3,
 23,5,77]