18889: Quasi Repdigit 188..889

First few terms (base 10): \[[18^*9_{10}]_n=\{19,189,1889,18889,188889,\ldots\}\]

General Formula:\[[18^*9_{10}]_n={170\cdot10^{n}+1\over9}\]

Equivalent Patterns: \[[56^*7_{10}]_n=3\cdot[18^*9_{10}]_n\] \[[37^*8_{10}]_n=2\cdot[18^*9_{10}]_n\] \[[75^*6_{10}]_n=4\cdot[18^*9_{10}]_n\] \[[94^*5_{10}]_n=5\cdot[18^*9_{10}]_n\]

See Also: Factorization of 188..889 on stdkmd.net

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