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A300518 as a simple table

na(n)
11
22
33
41
55
63
77
82
91
105
1111
123
1313
147
155
161
1717
182
1919
205
217
2211
2323
243
251
2613
273
287
2929
305
3131
322
3311
3417
357
361
3737
3819
3913
405
4141
427
4343
4411
455
4623
4747
483
491
502
5117
5213
5353
543
5511
567
5719
5829
5959
605
6161
6231
637
641
6513
6611
6767
6817
6923
707
7171
722
7373
7437

[1,2,3,1,5,3,7,2,1,5,11,3,13,7,5,1,17,2,19,5,7,11,
 23,3,1,13,3,7,29,5,31,2,11,17,7,1,37,19,13,5,41,7,
 43,11,5,23,47,3,1,2,17,13,53,3,11,7,19,29,59,5,61,
 31,7,1,13,11,67,17,23,7,71,2,73,37]