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A273847 as a simple table

na(n)
01
14
221
345
476
5121
6169
7225
8289
9361
10441
11529
12625
13729
14841
15961
161089
171225
181369
191521
201681
211849
222025
232209
242401
252601
262809
273025
283249
293481
303721
313969
324225
334489
344761
355041
365329
375625
385929
396241
406561
416889
427225
437569
447921
458281
468649

[1,4,21,45,76,121,169,225,289,361,441,529,625,729,
 841,961,1089,1225,1369,1521,1681,1849,2025,2209,
 2401,2601,2809,3025,3249,3481,3721,3969,4225,4489,
 4761,5041,5329,5625,5929,6241,6561,6889,7225,7569,
 7921,8281,8649]