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A171268 as a simple table

na(n)
15
211
337
461
573
6199
7751
83761
97993
1079193
117799999
121111111111111111111
1311111111111111111111111
14199999999999999999999999999

[5,11,37,61,73,199,751,3761,7993,79193,7799999,
 1111111111111111111,11111111111111111111111,
 199999999999999999999999999]