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A061457 as a simple table

na(n)
10
21
34
49
5100
6121
7144
8169
9400
10441
11484
12676
13900
14961
151089
169801
1710000
1810201
1910404
2010609
2112100
2212321
2312544
2412769
2514400
2614641
2714884
2816900
2940000
3040401
3140804
3244100
3344521
3444944
3548400
3648841
3767600
3869696
3990000
4090601

[0,1,4,9,100,121,144,169,400,441,484,676,900,961,
 1089,9801,10000,10201,10404,10609,12100,12321,
 12544,12769,14400,14641,14884,16900,40000,40401,
 40804,44100,44521,44944,48400,48841,67600,69696,
 90000,90601]