25557: Quasi Repdigit 255..557

First few terms (base 10): \[[25^*7_9]_n=\{25,214,1915,17224,155005,\ldots\}\]

First few terms (base 9): \[\{\text{27},\text{257},\text{2557},\text{25557},\text{255557},\ldots\}\]

General Formula:\[[25^*7_9]_n={189\cdot9^{n}+11\over8}\]

Equivalent Patterns: \[[52^*5_9]_n=2\cdot[25^*7_9]_n\]

Table

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