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A198187 as a simple table

na(n)
13
231
341
45
559
64159
714159
8314159
92
105
113
1253
13653
141592653
155
1689
17141592653589
187
1997
205897
2135897
226535897
235926535897
24415926535897
2579
2658979
27358979
283
29589793
302
313
3223
339323
349265358979323
352
363
3743
38643
39462643
4093238462643
413
42433
433
4483
45383

[3,31,41,5,59,4159,14159,314159,2,5,3,53,653,
 1592653,5,89,141592653589,7,97,5897,35897,6535897,
 5926535897,415926535897,79,58979,358979,3,589793,
 2,3,23,9323,9265358979323,2,3,43,643,462643,
 93238462643,3,433,3,83,383]