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A115855 as a simple table

na(n)
10
21
33
46
512
621
735
858
9106
10188
11243
12493
13593
141062
153275
165507
175803
1812426
1912915
2042410
21131772
22167587
23168841
24428012
25839367
261015501
271968161
285787286

[0,1,3,6,12,21,35,58,106,188,243,493,593,1062,
 3275,5507,5803,12426,12915,42410,131772,167587,
 168841,428012,839367,1015501,1968161,5787286]