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A090528 as a simple table

na(n)
12
213
323
4107
54241
66011
7212369
82600137
9769230769
1016783039447
1149260223471
1243267872370321
13156507138388141
1410680338789777057
15348051774975651917
161529094753948866477
17199727959773078870941
1832433109109185468674163

[2,13,23,107,4241,6011,212369,2600137,769230769,
 16783039447,49260223471,43267872370321,
 156507138388141,10680338789777057,
 348051774975651917,1529094753948866477,
 199727959773078870941,32433109109185468674163]