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A169955 as a simple table

na(n)
41
50
63
71
86
99
1030
1151
12198
13470
141623
154830
1616070
1751948
18175047
19588120
202015226
216933048
2224123941
2384428820
24297753519

[1,0,3,1,6,9,30,51,198,470,1623,4830,16070,51948,
 175047,588120,2015226,6933048,24123941,84428820,
 297753519]