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A152173 as a simple table

na(n)
21
30
41
52
64
710
823
956
10138
11344
12870
132220
145716
1514828
1638717
17101682
18268416
19711810
201895432
215066030
2213586082
2336547534
2498593064
25266661162
26722953814
271964358938
285348367006
2914589803090
3039870312218
31109136843138

[1,0,1,2,4,10,23,56,138,344,870,2220,5716,14828,
 38717,101682,268416,711810,1895432,5066030,
 13586082,36547534,98593064,266661162,722953814,
 1964358938,5348367006,14589803090,39870312218,
 109136843138]