51111: Near Repdigit 511..11

First few terms (base 10): \[[51^*_7]_n=\{5,36,253,1772,12405,\ldots\}\]

First few terms (base 7): \[\{\text{5},\text{51},\text{511},\text{5111},\text{51111},\ldots\}\]

General Formula:\[[51^*_7]_n={31\cdot7^{n}-1\over6}\]

Equivalent Patterns: (none)

Table

No table data.