33533: Near Repdigit Palindrome 33..33533..33

First few terms (base 10): \[[3^*53^*_7]_n=\{5,185,8501,412457,20181605,\ldots\}\]

First few terms (base 7): \[\{\text{5},\text{353},\text{33533},\text{3335333},\text{333353333},\ldots\}\]

General Formula:\[[3^*53^*_7]_n={7\cdot7^{2n}+4\cdot7^{n}-1\over2}\]

Equivalent Patterns: (none)

Table

No table data.