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A020148 as a simple table

na(n)
121
257
3133
4231
5399
6561
7671
8861
9889
101281
111653
121729
131891
142059
152413
162501
172761
182821
192947
203059
213201
224047
235271
245461
255473
265713
275833
286601
296817
307999
318421
328911
3311229
3411557
3511837
3612801
3713051
3813981
3914091
4015251
4115311
4215841

[21,57,133,231,399,561,671,861,889,1281,1653,1729,
 1891,2059,2413,2501,2761,2821,2947,3059,3201,4047,
 5271,5461,5473,5713,5833,6601,6817,7999,8421,8911,
 11229,11557,11837,12801,13051,13981,14091,15251,
 15311,15841]