57777: Near Repdigit 577..77

First few terms (base 10): \[[57^*_8]_n=\{5,47,383,3071,24575,\ldots\}\]

First few terms (base 8): \[\{\text{5},\text{57},\text{577},\text{5777},\text{57777},\ldots\}\]

General Formula:\[[57^*_8]_n=6\cdot8^{n}-1\]

Equivalent Patterns: \[[27^*4_8]_n=4\cdot[57^*_8]_n\]

Table

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