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A252279 as a simple table

na(n)
1257
2337
3881
41217
51249
61553
71777
82113
92593
102657
112833
124049
134177
144273
154481
164513
174721
184993
195297
206353
216449
226481
236529
246689
257121
267489
278081
288609
299137
309281
319649
3210177
3310337
3410369
3510433
3610657
3711329
3811617
3911633
4012049
4112241
4212577

[257,337,881,1217,1249,1553,1777,2113,2593,2657,
 2833,4049,4177,4273,4481,4513,4721,4993,5297,6353,
 6449,6481,6529,6689,7121,7489,8081,8609,9137,9281,
 9649,10177,10337,10369,10433,10657,11329,11617,
 11633,12049,12241,12577]