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A115689 as a simple table

na(n)
11
24
39
4100
5121
6144
7169
8400
9441
10484
11675
12676
13900
14961
151000
161089
171800
184000
199000
209801
2110000
2210201
2310404
2410609
2512100
2612321
2712544
2812769
2914400
3014641
3114884
3216900
3318000
3418252
3540000
3640401
3740804
3844100
3944521
4044944

[1,4,9,100,121,144,169,400,441,484,675,676,900,
 961,1000,1089,1800,4000,9000,9801,10000,10201,
 10404,10609,12100,12321,12544,12769,14400,14641,
 14884,16900,18000,18252,40000,40401,40804,44100,
 44521,44944]