55655: Near Repdigit Palindrome 55..55655..55

First few terms (base 10): \[[5^*65^*_9]_n=\{6,464,36986,2990084,242144366,\ldots\}\]

First few terms (base 9): \[\{\text{6},\text{565},\text{55655},\text{5556555},\text{555565555},\ldots\}\]

General Formula:\[[5^*65^*_9]_n={45\cdot9^{2n}+8\cdot9^{n}-5\over8}\]

Equivalent Patterns: (none)

Table

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