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A030661 as a simple table

na(n)
16
215
335
435
577
677
7143
8143
9143
10143
11221
12221
13323
14323
15323
16323
17437
18437
19667
20667
21667
22667
23899
24899
25899
26899
27899
28899
291147
301147
311517
321517
331517
341517
351517
361517
371763
381763
391763
401763

[6,15,35,35,77,77,143,143,143,143,221,221,323,323,
 323,323,437,437,667,667,667,667,899,899,899,899,
 899,899,1147,1147,1517,1517,1517,1517,1517,1517,
 1763,1763,1763,1763]