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A175971 as a simple table

na(n)
116
216
3144
4400
5144
6784
71296
8400
91936
102704
11784
123600
134624
141296
155776
167056
171936
188464
1910000
202704
2111664
2213456
233600
2415376
2517424
264624
2719600
2821904
295776
3024336
3126896
327056
3329584
3432400
358464
3635344
3738416
3810000
3941616
4044944
4111664
4248400
4351984
4413456
4555696

[16,16,144,400,144,784,1296,400,1936,2704,784,
 3600,4624,1296,5776,7056,1936,8464,10000,2704,
 11664,13456,3600,15376,17424,4624,19600,21904,
 5776,24336,26896,7056,29584,32400,8464,35344,
 38416,10000,41616,44944,11664,48400,51984,13456,
 55696]