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A128436 as a simple table

na(n)
13
27
331
437
597
6157
7211
8331
9547
10577
11661
12727
13811
14937
15967
161171
171297
181627
192011
202131
212137
222467
232551
242617
253067
263181
273331
283391
293607
304111
314507
324621
334861
345167
355431
365581
375851
386037
396121
406271
416841
426967
437297
447681
457867
468317

[3,7,31,37,97,157,211,331,547,577,661,727,811,937,
 967,1171,1297,1627,2011,2131,2137,2467,2551,2617,
 3067,3181,3331,3391,3607,4111,4507,4621,4861,5167,
 5431,5581,5851,6037,6121,6271,6841,6967,7297,7681,
 7867,8317]