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A184345 as a simple table

na(n)
11
21
32
41
54
67
717
8200
9353
104751
119857
1283181
13252001
141229378
155152888
1616936394
1788336546
18241607686

[1,1,2,1,4,7,17,200,353,4751,9857,83181,252001,
 1229378,5152888,16936394,88336546,241607686]