81111: Near Repdigit 811..11

First few terms (base 10): \[[81^*_9]_n=\{8,73,658,5923,53308,\ldots\}\]

First few terms (base 9): \[\{\text{8},\text{81},\text{811},\text{8111},\text{81111},\ldots\}\]

General Formula:\[[81^*_9]_n={65\cdot9^{n}-1\over8}\]

Equivalent Patterns: (none)

Table

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