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A028688 as a simple table

na(n)
11
22
33
46
516
621
724
845
996
10120
11175
12288
13315
14416
15441
16640
17720
18891
191200
201573
212016
222535
232835
243136
253825
264608
275040
285491
296480
307581
318800
329765
3310143
3411616
3511904
3613225
3714976
3816875
3918928
4021141
4123520
4226071
4328800
4431713

[1,2,3,6,16,21,24,45,96,120,175,288,315,416,441,
 640,720,891,1200,1573,2016,2535,2835,3136,3825,
 4608,5040,5491,6480,7581,8800,9765,10143,11616,
 11904,13225,14976,16875,18928,21141,23520,26071,
 28800,31713]