21113: Quasi Repdigit 211..113

First few terms (base 10): \[[21^*3_{10}]_n=\{23,213,2113,21113,211113,\ldots\}\]

General Formula:\[[21^*3_{10}]_n={190\cdot10^{n}+17\over9}\]

Equivalent Patterns: \[[63^*9_{10}]_n=3\cdot[21^*3_{10}]_n\] \[[42^*6_{10}]_n=2\cdot[21^*3_{10}]_n\]

See Also: Factorization of 211..113 on stdkmd.net

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