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A238702 as a simple table

na(n)
11
26
321
455
5119
6227
7396
8645
9996
101474
112106
122922
133955
145240
156815
168721
1711001
1813701
1916870
2020559
2124822
2229716
2335300
2441636
2548789
2656826
2765817
2875835
2986955
3099255
31112816
32127721
33144056
34161910
35181374
36202542
37225511
38250380
39277251
40306229

[1,6,21,55,119,227,396,645,996,1474,2106,2922,
 3955,5240,6815,8721,11001,13701,16870,20559,24822,
 29716,35300,41636,48789,56826,65817,75835,86955,
 99255,112816,127721,144056,161910,181374,202542,
 225511,250380,277251,306229]