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A268397 as a simple table

na(n)
12
25
311
437
553
683
783
8269
9269
10467
11467
121187
131559
141559
151559
166803
176803
186803
1910559
2010559
2110559
2235279
2338639
2438639
2538639
2638639
2738639

[2,5,11,37,53,83,83,269,269,467,467,1187,1559,
 1559,1559,6803,6803,6803,10559,10559,10559,35279,
 38639,38639,38639,38639,38639]