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A281533 as a simple table

na(n)
117
223
347
457
593
6107
7155
8173
9233
10255
11327
12353
13437
14467
15563
16597
17677
18705
19743
20863
21905
221037
231083
241187
251227
261277
271433
281487
291607
301655
311713
321893
331955
342027
352095
362147
372213
382293
392357
402417
412467
422487
432503
442703
452719
462777
472861
482993
493005
503083
513251

[17,23,47,57,93,107,155,173,233,255,327,353,437,
 467,563,597,677,705,743,863,905,1037,1083,1187,
 1227,1277,1433,1487,1607,1655,1713,1893,1955,2027,
 2095,2147,2213,2293,2357,2417,2467,2487,2503,2703,
 2719,2777,2861,2993,3005,3083,3251]