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A075408 as a simple table

na(n)
11
24
316
436
5100
6196
7256
8400
9576
10676
111296
121600
132916
143136
154356
165476
177056
188100
198836
2012100
2113456
2214400
2315376
2415876
2516900
2617956
2721316
2822500
2924336
3025600
3128900
3230976
3332400
3433856
3541616
3642436
3744100
3850176
3952900
4055696

[1,4,16,36,100,196,256,400,576,676,1296,1600,2916,
 3136,4356,5476,7056,8100,8836,12100,13456,14400,
 15376,15876,16900,17956,21316,22500,24336,25600,
 28900,30976,32400,33856,41616,42436,44100,50176,
 52900,55696]