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A109128 as a simple table

na(n)
01
11
21
31
43
51
61
75
85
91
101
117
1211
137
141
151
169
1719
1819
199
201
211
2211
2329
2439
2529
2611
271
281
2913
3041
3169
3269
3341
3413
351
361
3715
3855
39111
40139
41111
4255
4315
441
451
4617
4771
48167
49251
50251
51167
5271
5317
541
551
5619
5789
58239
59419
60503
61419
62239
6389
6419
651
661
6721
68109
69329
70659
71923
72923
73659
74329
75109
7621
771

[1,1,1,1,3,1,1,5,5,1,1,7,11,7,1,1,9,19,19,9,1,1,
 11,29,39,29,11,1,1,13,41,69,69,41,13,1,1,15,55,
 111,139,111,55,15,1,1,17,71,167,251,251,167,71,17,
 1,1,19,89,239,419,503,419,239,89,19,1,1,21,109,
 329,659,923,923,659,329,109,21,1]