38887: Quasi Repdigit 388..887

First few terms (base 10): \[[38^*7_{10}]_n=\{37,387,3887,38887,388887,\ldots\}\]

General Formula:\[[38^*7_{10}]_n={350\cdot10^{n}-17\over9}\]

Equivalent Patterns: \[[7^*4_{10}]_n=2\cdot[38^*7_{10}]_{n-1}\]

See Also: Factorization of 388..887 on stdkmd.net

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