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A204846 as a simple table

na(n)
11
21
31
411
51
63
711
837
91
1011
11101
123
1337
1411
1541
16271
171
183
197
2011
2113
2237
23101
241
2511
26239
274649
283
2937
3041
31271
3211
3373
34101
35137
361
373
387
3911
4013
4137
42333667
431
4411
4541
46101
47271
489091
493
5037
51239
524649
5311
5421649
55513239
561
573
587
5911
6013
6137
6273
63101
64137
659901
6641
67271

[1,1,1,11,1,3,11,37,1,11,101,3,37,11,41,271,1,3,7,
 11,13,37,101,1,11,239,4649,3,37,41,271,11,73,101,
 137,1,3,7,11,13,37,333667,1,11,41,101,271,9091,3,
 37,239,4649,11,21649,513239,1,3,7,11,13,37,73,101,
 137,9901,41,271]