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A180302 as a simple table

na(n)
12
25
313
431
561
6109
7181
8277
9397
10547
11733
12947
131213
141499
151831
162207
172633
183083
193583
204133
214751
225407
236073
246793
257589
268513
279397
2810313
2911353
3012409
3113451
3214713
3315889
3417299
3518593
3620129
3721613
3823167
3924851
4026561
4128387
4230203

[2,5,13,31,61,109,181,277,397,547,733,947,1213,
 1499,1831,2207,2633,3083,3583,4133,4751,5407,6073,
 6793,7589,8513,9397,10313,11353,12409,13451,14713,
 15889,17299,18593,20129,21613,23167,24851,26561,
 28387,30203]