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A081275 as a simple table

na(n)
01
131
297
3199
4337
5511
6721
7967
81249
91567
101921
112311
122737
133199
143697
154231
164801
175407
186049
196727
207441
218191
228977
239799
2410657
2511551
2612481
2713447
2814449
2915487
3016561
3117671
3218817
3319999
3421217
3522471
3623761
3725087
3826449
3927847
4029281
4130751
4232257

[1,31,97,199,337,511,721,967,1249,1567,1921,2311,
 2737,3199,3697,4231,4801,5407,6049,6727,7441,8191,
 8977,9799,10657,11551,12481,13447,14449,15487,
 16561,17671,18817,19999,21217,22471,23761,25087,
 26449,27847,29281,30751,32257]