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A059403 as a simple table

na(n)
00
10
20
31
44
59
620
736
864
9100
10156
11225
12324
13441
14600
15784
161024
171296
181640
192025
202500
213025
223660
234356
245184
256084
267140
278281
289604
2911025
3012656
3114400
3216384
3318496
3420880
3523409
3626244
3729241
3832580
3936100
4040000
4144100
4248620
4353361

[0,0,0,1,4,9,20,36,64,100,156,225,324,441,600,784,
 1024,1296,1640,2025,2500,3025,3660,4356,5184,6084,
 7140,8281,9604,11025,12656,14400,16384,18496,
 20880,23409,26244,29241,32580,36100,40000,44100,
 48620,53361]