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A181363 as a simple table

na(n)
11
21
32
41
53
62
75
81
97
103
1111
122
1313
145
1517
161
1719
187
1923
203
2129
2211
2331
242
2537
2613
2741
285
2943
3017
3147
321
3353
3419
3559
367
3761
3823
3967
403
4171
4229
4373
4411
4579
4631
4783
482
4989
5037
5197
5213
53101
5441
55103
565
57107
5843
59109
6017
61113
6247
63127
641
65131
6653
67137
6819
69139
7059
71149
727
73151
7461

[1,1,2,1,3,2,5,1,7,3,11,2,13,5,17,1,19,7,23,3,29,
 11,31,2,37,13,41,5,43,17,47,1,53,19,59,7,61,23,67,
 3,71,29,73,11,79,31,83,2,89,37,97,13,101,41,103,5,
 107,43,109,17,113,47,127,1,131,53,137,19,139,59,
 149,7,151,61]