13111: Near Repdigit 1311..11

First few terms (base 10): \[[131^*_8]_n=\{11,89,713,5705,45641,\ldots\}\]

First few terms (base 8): \[\{\text{13},\text{131},\text{1311},\text{13111},\text{131111},\ldots\}\]

General Formula:\[[131^*_8]_n={78\cdot8^{n}-1\over7}\]

Equivalent Patterns: \[[54^*_8]_n=4\cdot[131^*_8]_{n-1}\] \[[262^*_8]_n=2\cdot[131^*_8]_n\]

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