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A023680 as a simple table

na(n)
1725
21125
31600
41957
52000
62048
72225
82304
92525
102624
112777
123600
133981
144205
154225
164352
174400
184525
194752
204913
215125
225225
235725
245744
256125
266224
276809
287053
297056
307168
317225
327232
337488
347537
357600
367625
378000
388069
398112
408468
418525
428725

[725,1125,1600,1957,2000,2048,2225,2304,2525,2624,
 2777,3600,3981,4205,4225,4352,4400,4525,4752,4913,
 5125,5225,5725,5744,6125,6224,6809,7053,7056,7168,
 7225,7232,7488,7537,7600,7625,8000,8069,8112,8468,
 8525,8725]