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A297860 as a simple table

na(n)
10
21
32
45
510
625
754
8125
9282
10641
111454
123301
137490
1417001
1538582
1687565
17198730
18451025
191023614
202323125
215272402
2211965881
2327156934
2461633501
25139879130
26317460001
27720485262
281635163525
293711054050
308422351625
3119114786774

[0,1,2,5,10,25,54,125,282,641,1454,3301,7490,
 17001,38582,87565,198730,451025,1023614,2323125,
 5272402,11965881,27156934,61633501,139879130,
 317460001,720485262,1635163525,3711054050,
 8422351625,19114786774]