15555: Near Repdigit 155..55

First few terms (base 10): \[[15^*_6]_n=\{1,11,71,431,2591,\ldots\}\]

First few terms (base 6): \[\{\text{1},\text{15},\text{155},\text{1555},\text{15555},\ldots\}\]

General Formula:\[[15^*_6]_n=2\cdot6^{n}-1\]

Equivalent Patterns: \[[35^*4_6]_n=2\cdot[15^*_6]_{n+1}\] \[[5^*3_6]_n=3\cdot[15^*_6]_n\]

Table

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