33133: Near Repdigit Palindrome 33..33133..33

First few terms (base 10): \[[3^*13^*_9]_n=\{1,255,21981,1792155,145269561,\ldots\}\]

First few terms (base 9): \[\{\text{1},\text{313},\text{33133},\text{3331333},\text{333313333},\ldots\}\]

General Formula:\[[3^*13^*_9]_n={27\cdot9^{2n}-16\cdot9^{n}-3\over8}\]

Equivalent Patterns: \[[6^*26^*_9]_n=2\cdot[3^*13^*_9]_n\]

Table

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