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A337715 as a simple table

na(n)
1341
2525
3651
4765
51155
61387
71683
81935
92047
102701
113277
123751
134033
144165
154305
164369
174455
184681
195461
205525
215715
226025
236643
247161
257239
267957
278265
288321
298925
309471
319605
3210261
3310571
3410965
3512103
3612325
3713113
3813747
3913981
4014491
4115709
4216275
4316485

[341,525,651,765,1155,1387,1683,1935,2047,2701,
 3277,3751,4033,4165,4305,4369,4455,4681,5461,5525,
 5715,6025,6643,7161,7239,7957,8265,8321,8925,9471,
 9605,10261,10571,10965,12103,12325,13113,13747,
 13981,14491,15709,16275,16485]