21113: Quasi Repdigit 211..113

First few terms (base 10): \[[21^*3_7]_n=\{17,108,745,5204,36417,\ldots\}\]

First few terms (base 7): \[\{\text{23},\text{213},\text{2113},\text{21113},\text{211113},\ldots\}\]

General Formula:\[[21^*3_7]_n={91\cdot7^{n}+11\over6}\]

Equivalent Patterns: \[[42^*6_7]_n=2\cdot[21^*3_7]_n\]

Table

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