69991: Quasi Repdigit 699..991

First few terms (base 10): \[[69^*1_{10}]_n=\{61,691,6991,69991,699991,\ldots\}\]

General Formula:\[[69^*1_{10}]_n=70\cdot10^{n}-9\]

Equivalent Patterns: (none)

See Also: Factorization of 699..991 on stdkmd.net

Table

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