17777: Near Repdigit 177..77

First few terms (base 10): \[[17^*_9]_n=\{1,16,151,1366,12301,\ldots\}\]

First few terms (base 9): \[\{\text{1},\text{17},\text{177},\text{1777},\text{17777},\ldots\}\]

General Formula:\[[17^*_9]_n={15\cdot9^{n}-7\over8}\]

Equivalent Patterns: \[[36^*5_9]_n=2\cdot[17^*_9]_{n+1}\] \[[74^*1_9]_n=4\cdot[17^*_9]_{n+1}\] \[[5^*3_9]_n=3\cdot[17^*_9]_n\]

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