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A267986 as a simple table

na(n)
149
281
3121
4125
5169
6196
7216
8225
9243
10289
11324
12361
13441
14484
15529
16625
17676
18729
19784
20841
21900
22961
231000
241089
251156
261225
271296
281331
291369
301444
311521
321681
331764
341849
351936
362025
372116
382187
392197
402209
412401
422500
432601
442704
452744
462809
472916
483025
493125
503136

[49,81,121,125,169,196,216,225,243,289,324,361,
 441,484,529,625,676,729,784,841,900,961,1000,1089,
 1156,1225,1296,1331,1369,1444,1521,1681,1764,1849,
 1936,2025,2116,2187,2197,2209,2401,2500,2601,2704,
 2744,2809,2916,3025,3125,3136]