55554: Near Repdigit 55..554

First few terms (base 10): \[[5^*4_9]_n=\{4,49,454,4099,36904,\ldots\}\]

First few terms (base 9): \[\{\text{4},\text{54},\text{554},\text{5554},\text{55554},\ldots\}\]

General Formula:\[[5^*4_9]_n={45\cdot9^{n}-13\over8}\]

Equivalent Patterns: \[[17^*3_9]_n=3\cdot[5^*4_9]_n\]

Table

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