88887: Near Repdigit 88..887

First few terms (base 10): \[[8^*7_9]_n=\{7,79,727,6559,59047,\ldots\}\]

First few terms (base 9): \[\{\text{7},\text{87},\text{887},\text{8887},\text{88887},\ldots\}\]

General Formula:\[[8^*7_9]_n=9\cdot9^{n}-2\]

Equivalent Patterns: \[[18^*5_9]_n=2\cdot[8^*7_9]_n\] \[[38^*1_9]_n=4\cdot[8^*7_9]_n\] \[[28^*3_9]_n=3\cdot[8^*7_9]_n\]

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