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A127798 as a simple table

na(n)
01
11
25
35
47
57
67
725
85
931
1049
1131
1235
1325
1423
1511
1617
1729
1847
19103
207
215
227
2323
24133
2519
265
2713
287
29215
3089
315
3253
3389
3417
3535
36257
3729
3819
39193
4013
41121
4279
4371
4453
4561
46287
4761
48107
49125
505
51203
5223
53119
5489
555
5695
5761
587
5929
60191
61211
62119
6331
64377
6537
6649
6789
68161
695
70785

[1,1,5,5,7,7,7,25,5,31,49,31,35,25,23,11,17,29,47,
 103,7,5,7,23,133,19,5,13,7,215,89,5,53,89,17,35,
 257,29,19,193,13,121,79,71,53,61,287,61,107,125,5,
 203,23,119,89,5,95,61,7,29,191,211,119,31,377,37,
 49,89,161,5,785]