75555: Near Repdigit 755..55

First few terms (base 10): \[[75^*_8]_n=\{7,61,493,3949,31597,\ldots\}\]

First few terms (base 8): \[\{\text{7},\text{75},\text{755},\text{7555},\text{75555},\ldots\}\]

General Formula:\[[75^*_8]_n={54\cdot8^{n}-5\over7}\]

Equivalent Patterns: \[[36^*4_8]_n=4\cdot[75^*_8]_n\]

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