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A260880 as a simple table

na(n)
01
11
29
37
43
53
637
77
87
919
103
1137
1231
1337
1461
1513
163
173
1839
19139
2057
219
2249
237
2467
25331
26319
27211
2857
2933
3049
3161
32103
3369
3467
3543
36321
3737
383
39169
4063
4157
4231
43121
449
4533
46217
4769
489
49327
50171
51157
5231
5321
54279
553
56193
5719
5867
597
60121
61399
6257
6349
6449
6549

[1,1,9,7,3,3,37,7,7,19,3,37,31,37,61,13,3,3,39,
 139,57,9,49,7,67,331,319,211,57,33,49,61,103,69,
 67,43,321,37,3,169,63,57,31,121,9,33,217,69,9,327,
 171,157,31,21,279,3,193,19,67,7,121,399,57,49,49,
 49]