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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A276509 as a simple table

na(n)
12
247
3497
44997
549997
6499997
74999997
849999997
9499999997
104999999997
1149999999997
12499999999997
134999999999997
1449999999999997
15499999999999997
164999999999999997
1749999999999999997
18499999999999999997
194999999999999999997
2049999999999999999997
21499999999999999999997

[2,47,497,4997,49997,499997,4999997,49999997,
 499999997,4999999997,49999999997,499999999997,
 4999999999997,49999999999997,499999999999997,
 4999999999999997,49999999999999997,
 499999999999999997,4999999999999999997,
 49999999999999999997,499999999999999999997]