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A087348 as a simple table

na(n)
15
229
373
4137
5221
6325
7449
8593
9757
10941
111145
121369
131613
141877
152161
162465
172789
183133
193497
203881
214285
224709
235153
245617
256101
266605
277129
287673
298237
308821
319425
3210049
3310693
3411357
3512041
3612745
3713469
3814213
3914977
4015761
4116565
4217389
4318233
4419097

[5,29,73,137,221,325,449,593,757,941,1145,1369,
 1613,1877,2161,2465,2789,3133,3497,3881,4285,4709,
 5153,5617,6101,6605,7129,7673,8237,8821,9425,
 10049,10693,11357,12041,12745,13469,14213,14977,
 15761,16565,17389,18233,19097]