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A100911 as a simple table

na(n)
10
21
34
46
515
621
725
870
9129
10399
11511
12856
139574
1414479
1517649
1627054
1728296
1832796
1938176

[0,1,4,6,15,21,25,70,129,399,511,856,9574,14479,
 17649,27054,28296,32796,38176]