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A290312 as a simple table

na(n)
01
18
229
375
4160
5301
6518
7834
81275
91870
102651
113653
124914
136475
148380
1510676
1613413
1716644
1820425
1924815
2029876
2135673
2242274
2349750
2458175
2567626
2678183
2789929
28102950
29117335
30133176
31150568
32169609
33190400
34213045
35237651
36264328
37293189
38324350
39357930

[1,8,29,75,160,301,518,834,1275,1870,2651,3653,
 4914,6475,8380,10676,13413,16644,20425,24815,
 29876,35673,42274,49750,58175,67626,78183,89929,
 102950,117335,133176,150568,169609,190400,213045,
 237651,264328,293189,324350,357930]