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A163834 as a simple table

na(n)
02
13
27
323
487
5343
61367
75463
821847
987383
10349527
111398103
125592407
1322369623
1489478487
15357913943
161431655767
175726623063
1822906492247
1991625968983
20366503875927
211466015503703
225864062014807
2323456248059223
2493824992236887
25375299968947543

[2,3,7,23,87,343,1367,5463,21847,87383,349527,
 1398103,5592407,22369623,89478487,357913943,
 1431655767,5726623063,22906492247,91625968983,
 366503875927,1466015503703,5864062014807,
 23456248059223,93824992236887,375299968947543]