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A127737 as a simple table

na(n)
11
23
34
43
57
69
73
87
913
1016
113
127
1313
1421
1525
163
177
1813
1921
2031
2136
223
237
2413
2521
2631
2743
2849
293
307
3113
3221
3331
3443
3557
3664
373
387
3913
4021
4131
4243
4357
4473
4581
463
477
4813
4921
5031
5143
5257
5373
5491
55100

[1,3,4,3,7,9,3,7,13,16,3,7,13,21,25,3,7,13,21,31,
 36,3,7,13,21,31,43,49,3,7,13,21,31,43,57,64,3,7,
 13,21,31,43,57,73,81,3,7,13,21,31,43,57,73,91,100]