21115: Quasi Repdigit 211..115

First few terms (base 10): \[[21^*5_7]_n=\{19,110,747,5206,36419,\ldots\}\]

First few terms (base 7): \[\{\text{25},\text{215},\text{2115},\text{21115},\text{211115},\ldots\}\]

General Formula:\[[21^*5_7]_n={91\cdot7^{n}+23\over6}\]

Equivalent Patterns: (none)

Table

No table data.