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A253261 as a simple table

na(n)
181
2121
3225
4441
5625
6729
71089
81225
91521
102025
112401
122601
133025
143249
153969
164225
174761
185625
195929
206561
217225
227569
238281
248649
259025
269801
2711025
2812321
2913225
3013689
3114161
3214641
3315129
3415625
3516641
3617689
3718225
3819881
3920449
4021025
4121609
4223409
4324025
4425281
4525921
4627225
4728561

[81,121,225,441,625,729,1089,1225,1521,2025,2401,
 2601,3025,3249,3969,4225,4761,5625,5929,6561,7225,
 7569,8281,8649,9025,9801,11025,12321,13225,13689,
 14161,14641,15129,15625,16641,17689,18225,19881,
 20449,21025,21609,23409,24025,25281,25921,27225,
 28561]