21222: Near Repdigit 2122..22

First few terms (base 10): \[[212^*_7]_n=\{15,107,751,5259,36815,\ldots\}\]

First few terms (base 7): \[\{\text{21},\text{212},\text{2122},\text{21222},\text{212222},\ldots\}\]

General Formula:\[[212^*_7]_n={46\cdot7^{n}-1\over3}\]

Equivalent Patterns: \[[636^*_7]_n=3\cdot[212^*_7]_n\] \[[424^*_7]_n=2\cdot[212^*_7]_n\]

Table

No table data.