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A280804 as a simple table

na(n)
10
21
33
418
572
6284
71047
83722
912816
1043077
11142046
12461225
131478635
144689871
1514740063
1645963889
17142346346
18438168498
191341507977
204087399361
2112399650175
2237467705018
23112808649521
24338530408321
251012834966758
263021810804515

[0,1,3,18,72,284,1047,3722,12816,43077,142046,
 461225,1478635,4689871,14740063,45963889,
 142346346,438168498,1341507977,4087399361,
 12399650175,37467705018,112808649521,338530408321,
 1012834966758,3021810804515]