27777: Near Repdigit 277..77

First few terms (base 10): \[[27^*_8]_n=\{2,23,191,1535,12287,\ldots\}\]

First few terms (base 8): \[\{\text{2},\text{27},\text{277},\text{2777},\text{27777},\ldots\}\]

General Formula:\[[27^*_8]_n=3\cdot8^{n}-1\]

Equivalent Patterns: \[[57^*6_8]_n=2\cdot[27^*_8]_{n+1}\]

Table

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