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A258735 as a simple table

na(n)
14096
211704
320955
435540
559188
692548
7138196
8199264
9279560
10383704
11517281
12687012
13900944
141168660
151501510
161912864
172418388
183036344
193787915
204697556
215793372
227107524
238676664
2410542400
2512751792
2615357880
2718420245
2822005604

[4096,11704,20955,35540,59188,92548,138196,199264,
 279560,383704,517281,687012,900944,1168660,
 1501510,1912864,2418388,3036344,3787915,4697556,
 5793372,7107524,8676664,10542400,12751792,
 15357880,18420245,22005604]