13111: Near Repdigit 1311..11

First few terms (base 10): \[[131^*_9]_n=\{12,109,982,8839,79552,\ldots\}\]

First few terms (base 9): \[\{\text{13},\text{131},\text{1311},\text{13111},\text{131111},\ldots\}\]

General Formula:\[[131^*_9]_n={97\cdot9^{n}-1\over8}\]

Equivalent Patterns: \[[262^*_9]_n=2\cdot[131^*_9]_n\]

Table

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