51555: Near Repdigit 5155..55

First few terms (base 10): \[[515^*_9]_n=\{46,419,3776,33989,305906,\ldots\}\]

First few terms (base 9): \[\{\text{51},\text{515},\text{5155},\text{51555},\text{515555},\ldots\}\]

General Formula:\[[515^*_9]_n={373\cdot9^{n}-5\over8}\]

Equivalent Patterns: (none)

Table

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