55455: Near Repdigit Palindrome 55..55455..55

First few terms (base 10): \[[5^*45^*_9]_n=\{4,446,36824,2988626,242131244,\ldots\}\]

First few terms (base 9): \[\{\text{4},\text{545},\text{55455},\text{5554555},\text{555545555},\ldots\}\]

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

Equivalent Patterns: (none)

Table

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