21115: Quasi Repdigit 211..115

First few terms (base 10): \[[21^*5_9]_n=\{23,176,1553,13946,125483,\ldots\}\]

First few terms (base 9): \[\{\text{25},\text{215},\text{2115},\text{21115},\text{211115},\ldots\}\]

General Formula:\[[21^*5_9]_n={153\cdot9^{n}+31\over8}\]

Equivalent Patterns: (none)

Table

No table data.