77779: Near Repdigit 77..779

First few terms (base 10): \[[7^*9_{10}]_n=\{9,79,779,7779,77779,\ldots\}\]

General Formula:\[[7^*9_{10}]_n={70\cdot10^{n}+11\over9}\]

Equivalent Patterns: \[[23^*7_{10}]_n=3\cdot[7^*9_{10}]_n\] \[[15^*8_{10}]_n=2\cdot[7^*9_{10}]_n\] \[[31^*6_{10}]_n=4\cdot[7^*9_{10}]_n\]

See Also: Factorization of 77..779 on stdkmd.net

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