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A139961 as a simple table

na(n)
117
241
3113
4233
5401
6449
7521
8617
9641
10809
11857
12881
13929
141049
151193
161217
171289
181433
191553
201601
211697
222081
232153
242273
252417
262441
272657
282777
292897
302969
313089
323257
333329
343593
353881
364001
374049
384073
394289
404409
414457
424481

[17,41,113,233,401,449,521,617,641,809,857,881,
 929,1049,1193,1217,1289,1433,1553,1601,1697,2081,
 2153,2273,2417,2441,2657,2777,2897,2969,3089,3257,
 3329,3593,3881,4001,4049,4073,4289,4409,4457,4481]