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A097080 as a simple table

na(n)
13
27
315
427
543
663
787
8115
9147
10183
11223
12267
13315
14367
15423
16483
17547
18615
19687
20763
21843
22927
231015
241107
251203
261303
271407
281515
291627
301743
311863
321987
332115
342247
352383
362523
372667
382815
392967
403123
413283
423447
433615
443787
453963
464143
474327
484515
494707

[3,7,15,27,43,63,87,115,147,183,223,267,315,367,
 423,483,547,615,687,763,843,927,1015,1107,1203,
 1303,1407,1515,1627,1743,1863,1987,2115,2247,2383,
 2523,2667,2815,2967,3123,3283,3447,3615,3787,3963,
 4143,4327,4515,4707]