13111: Near Repdigit 1311..11

First few terms (base 10): \[[131^*_4]_n=\{7,29,117,469,1877,\ldots\}\]

First few terms (base 4): \[\{\text{13},\text{131},\text{1311},\text{13111},\text{131111},\ldots\}\]

General Formula:\[[131^*_4]_n={22\cdot4^{n}-1\over3}\]

Equivalent Patterns: \[[32^*_4]_n=2\cdot[131^*_4]_{n-1}\]

Table

No table data.