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A107181 as a simple table

na(n)
117
241
389
4113
5137
6233
7257
8281
9353
10401
11449
12521
13569
14593
15617
16641
17761
18809
19857
20881
21929
22953
23977
241049
251097
261193
271217
281289
291361
301409
311433
321481
331553
341601
351697
361721
371889
381913
392081
402129
412153
422273
432297
442393
452417

[17,41,89,113,137,233,257,281,353,401,449,521,569,
 593,617,641,761,809,857,881,929,953,977,1049,1097,
 1193,1217,1289,1361,1409,1433,1481,1553,1601,1697,
 1721,1889,1913,2081,2129,2153,2273,2297,2393,2417]