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A090688 as a simple table

na(n)
13
27
32
43
519
65
7251
87
989
1043
1111
12467
1313
1459
1567
1617
17683
1819
1983
20197
21367
2223
23103
24107
25251
26463
2729
284463
2931
30131
311223
32139
3311987
3437
357643
36359
37163
3841
3913931
4043
41179
4233533
43751
4447
45199
465099
47467
48211
4953
501979
51223
52227
53521
5423599
5559
568783
5761

[3,7,2,3,19,5,251,7,89,43,11,467,13,59,67,17,683,
 19,83,197,367,23,103,107,251,463,29,4463,31,131,
 1223,139,11987,37,7643,359,163,41,13931,43,179,
 33533,751,47,199,5099,467,211,53,1979,223,227,521,
 23599,59,8783,61]