66566: Near Repdigit Palindrome 66..66566..66

First few terms (base 10): \[[6^*56^*_9]_n=\{5,537,44205,3586497,290558805,\ldots\}\]

First few terms (base 9): \[\{\text{5},\text{656},\text{66566},\text{6665666},\text{666656666},\ldots\}\]

General Formula:\[[6^*56^*_9]_n={27\cdot9^{2n}-4\cdot9^{n}-3\over4}\]

Equivalent Patterns: (none)

Table

No table data.