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A259580 as a simple table

na(n)
12
25
38
417
530
650
778
8116
9162
10227
11300
12389
13498
14628
15766
16940
171128
181347
191584
201855
212146
222486
232838
243236
253660
264135
274626
285177
295754
306392
317050
327776
338524
349353
3510204
3611127
3712078
3813114
3914170
4015328
4116500
4217775
4319068
4420461
4521900

[2,5,8,17,30,50,78,116,162,227,300,389,498,628,
 766,940,1128,1347,1584,1855,2146,2486,2838,3236,
 3660,4135,4626,5177,5754,6392,7050,7776,8524,9353,
 10204,11127,12078,13114,14170,15328,16500,17775,
 19068,20461,21900]