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A161326 as a simple table

na(n)
19
221
315
421
527
651
733
821
927
1051
1151
1257
1369
14117
1587
1633
1727
1851
1951
2057
2175
22129
23117
2475
2569
26117
27135

[9,21,15,21,27,51,33,21,27,51,51,57,69,117,87,33,
 27,51,51,57,75,129,117,75,69,117,135]