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A349820 as a simple table

na(n)
15
27
311
419
531
647
779
8103
9191
10239
11383
12479
13863
14991
152687
162879
173391
184799
196719
209343
2121503
2223039
2336607
2469119
2572959
26126719
27152063
28382463
29602111
30927743
31972799
321096703
331102847
341640447
351655807
361966079
373565567
383590143
394124671
405402623

[5,7,11,19,31,47,79,103,191,239,383,479,863,991,
 2687,2879,3391,4799,6719,9343,21503,23039,36607,
 69119,72959,126719,152063,382463,602111,927743,
 972799,1096703,1102847,1640447,1655807,1966079,
 3565567,3590143,4124671,5402623]