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A087877 as a simple table

na(n)
117
241
389
497
5233
6257
7281
8313
9337
10353
11401
12433
13457
14569
15577
16601
17641
18769
19809
20857
21881
22953
231049
241097
251153
261193
271201
281297
291321
301409
311433
321489
331601
341697
351873
361889
372017
382081
392089
402113
412137
422153
432281
442377
452393
462417
472441

[17,41,89,97,233,257,281,313,337,353,401,433,457,
 569,577,601,641,769,809,857,881,953,1049,1097,
 1153,1193,1201,1297,1321,1409,1433,1489,1601,1697,
 1873,1889,2017,2081,2089,2113,2137,2153,2281,2377,
 2393,2417,2441]