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A231720 as a simple table

na(n)
01
15
215
317
421
523
657
759
863
965
1069
1171
1281
1383
1487
1589
1693
1795
18105
19107
20111
21113
22117
23119
24273
25275
26279
27281
28285
29287
30297
31299
32303
33305
34309
35311
36321
37323
38327
39329
40333
41335
42345
43347
44351
45353
46357
47359
48393
49395
50399
51401
52405
53407
54417
55419

[1,5,15,17,21,23,57,59,63,65,69,71,81,83,87,89,93,
 95,105,107,111,113,117,119,273,275,279,281,285,
 287,297,299,303,305,309,311,321,323,327,329,333,
 335,345,347,351,353,357,359,393,395,399,401,405,
 407,417,419]