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A060712 as a simple table

na(n)
01
13
29
3999
4999999999
5999999999999999999999999999
6999999999999999999999999999999999999999999999999999999999999999999999999999999999

[1,3,9,999,999999999,999999999999999999999999999,
 99999999999999999999999999999999999999999999999999\
 9999999999999999999999999999999]