44144: Near Repdigit Palindrome 44..44144..44

First few terms (base 10): \[[4^*14^*_9]_n=\{1,337,29281,2389297,193690561,\ldots\}\]

First few terms (base 9): \[\{\text{1},\text{414},\text{44144},\text{4441444},\text{444414444},\ldots\}\]

General Formula:\[[4^*14^*_9]_n={9\cdot9^{2n}-6\cdot9^{n}-1\over2}\]

Equivalent Patterns: \[[8^*28^*_9]_n=2\cdot[4^*14^*_9]_n\]

Table

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