21222: Near Repdigit 2122..22

First few terms (base 10): \[[212^*_{10}]_n=\{21,212,2122,21222,212222,\ldots\}\]

General Formula:\[[212^*_{10}]_n={191\cdot10^{n}-2\over9}\]

Equivalent Patterns: \[[636^*_{10}]_n=3\cdot[212^*_{10}]_n\] \[[424^*_{10}]_n=2\cdot[212^*_{10}]_n\] \[[848^*_{10}]_n=4\cdot[212^*_{10}]_n\]

See Also: Factorization of 2122..22 on stdkmd.net

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