26665: Quasi Repdigit 266..665

First few terms (base 10): \[[26^*5_9]_n=\{23,221,2003,18041,162383,\ldots\}\]

First few terms (base 9): \[\{\text{25},\text{265},\text{2665},\text{26665},\text{266665},\ldots\}\]

General Formula:\[[26^*5_9]_n={99\cdot9^{n}-7\over4}\]

Equivalent Patterns: \[[54^*1_9]_n=2\cdot[26^*5_9]_n\]

Table

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