55155: Near Repdigit Palindrome 55..55155..55

First few terms (base 10): \[[5^*15^*_6]_n=\{1,191,7631,279071,10072511,\ldots\}\]

First few terms (base 6): \[\{\text{1},\text{515},\text{55155},\text{5551555},\text{555515555},\ldots\}\]

General Formula:\[[5^*15^*_6]_n=6\cdot6^{2n}-4\cdot6^{n}-1\]

Equivalent Patterns: (none)

Table

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