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A331343 as a simple table

na(n)
10
21
39
439
5375
6685
78575
830485
9162855
10291627
115785857
1210514427
13250200951
14461037291
15854622483
163185234481
17101381371377
18190598779657
196833215763803
2012935721409039
2124559552771039
2246750514134519
232051664357879617
243923102768811707
2537581323659852375

[0,1,9,39,375,685,8575,30485,162855,291627,
 5785857,10514427,250200951,461037291,854622483,
 3185234481,101381371377,190598779657,
 6833215763803,12935721409039,24559552771039,
 46750514134519,2051664357879617,3923102768811707,
 37581323659852375]