71111: Near Repdigit 711..11

First few terms (base 10): \[[71^*_9]_n=\{7,64,577,5194,46747,\ldots\}\]

First few terms (base 9): \[\{\text{7},\text{71},\text{711},\text{7111},\text{71111},\ldots\}\]

General Formula:\[[71^*_9]_n={57\cdot9^{n}-1\over8}\]

Equivalent Patterns: \[[23^*_9]_n=3\cdot[71^*_9]_{n-1}\] \[[46^*_9]_n=6\cdot[71^*_9]_{n-1}\]

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