33331: Near Repdigit 33..331

First few terms (base 10): \[[3^*1_7]_n=\{1,22,169,1198,8401,\ldots\}\]

First few terms (base 7): \[\{\text{1},\text{31},\text{331},\text{3331},\text{33331},\ldots\}\]

General Formula:\[[3^*1_7]_n={7\cdot7^{n}-5\over2}\]

Equivalent Patterns: \[[6^*2_7]_n=2\cdot[3^*1_7]_n\]

Table

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