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A039752 as a simple table

na(n)
15
28
315
477
5125
6714
7948
81330
91520
101862
112491
123248
134185
144191
155405
165560
175959
186867
198280
208463
2110647
2212351
2314587
2416932
2517080
2618490
2720450
2824895
2926642
3026649
3128448
3228809
3333019
3437828
3537881
3641261
3742624
3843215
3944831
4044891
4147544
4249240

[5,8,15,77,125,714,948,1330,1520,1862,2491,3248,
 4185,4191,5405,5560,5959,6867,8280,8463,10647,
 12351,14587,16932,17080,18490,20450,24895,26642,
 26649,28448,28809,33019,37828,37881,41261,42624,
 43215,44831,44891,47544,49240]