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A045972 as a simple table

na(n)
19
225
349
4125
5121
61225
7169
8625
9343
103025
11289
126125
13361
144225
155929
163125
17529
188575
19841
2015125
218281
227225
23961
2430625
251331
269025
272401
2821125
291369
30148225
311681
3215625
3314161
3413225
3520449
3642875
371849
3821025
3917689
4075625
412209
42207025

[9,25,49,125,121,1225,169,625,343,3025,289,6125,
 361,4225,5929,3125,529,8575,841,15125,8281,7225,
 961,30625,1331,9025,2401,21125,1369,148225,1681,
 15625,14161,13225,20449,42875,1849,21025,17689,
 75625,2209,207025]