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A290865 as a simple table

na(n)
10
21
33
47
515
630
756
898
9161
10250
11370
12536
13748
141027
151379
161807
172320
182954
193702
204604
215652
226852
238239
249858
2511683
2613748
2716086
2818700
2921604
3024887
3128471
3232491
3336907
3441751
3547080
3652876
3759105
3865965
3973440
4081521
4190176

[0,1,3,7,15,30,56,98,161,250,370,536,748,1027,
 1379,1807,2320,2954,3702,4604,5652,6852,8239,9858,
 11683,13748,16086,18700,21604,24887,28471,32491,
 36907,41751,47080,52876,59105,65965,73440,81521,
 90176]