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A068864 as a simple table

na(n)
11
24
39
416
525
636
749
864
981
10100
11225
12144
13256
14121
15289
16196
17324
18169
19400
20361
21484
22529
23441
24576
25625
26784
27676
28729
29841
30900
311024
32961
331089
342116
351225
362304
371156
382025
391296
402401
411369
422500
431444
442209
451521
462704
471681
482809
491764
502601

[1,4,9,16,25,36,49,64,81,100,225,144,256,121,289,
 196,324,169,400,361,484,529,441,576,625,784,676,
 729,841,900,1024,961,1089,2116,1225,2304,1156,
 2025,1296,2401,1369,2500,1444,2209,1521,2704,1681,
 2809,1764,2601]