44544: Near Repdigit Palindrome 44..44544..44

First few terms (base 10): \[[4^*54^*_9]_n=\{5,373,29605,2392213,193716805,\ldots\}\]

First few terms (base 9): \[\{\text{5},\text{454},\text{44544},\text{4445444},\text{444454444},\ldots\}\]

General Formula:\[[4^*54^*_9]_n={9\cdot9^{2n}+2\cdot9^{n}-1\over2}\]

Equivalent Patterns: (none)

Table

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