77775: Near Repdigit 77..775

First few terms (base 10): \[[7^*5_8]_n=\{5,61,509,4093,32765,\ldots\}\]

First few terms (base 8): \[\{\text{5},\text{75},\text{775},\text{7775},\text{77775},\ldots\}\]

General Formula:\[[7^*5_8]_n=8\cdot8^{n}-3\]

Equivalent Patterns: \[[17^*2_8]_n=2\cdot[7^*5_8]_n\]

Table

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